River entering quantity calculation method, system and equipment

Abstract

According to the method, the system and the equipment for calculating the river entering quantity, the influence of administrative division and hydrological and geographic characteristics on the river entering quantity is taken into consideration, and the river entering quantity of an analysis unit is subjected to data distinguishing according to the influence of water supply and rainfall; different metering methods such as a water supply data survey method, a population quota method and an industrial output value method are adopted to calculate and count different types of water quantity data, a more accurate water quantity calculation result is provided, and the problems that river entering quantity analysis of an analysis unit seriously depends on the technical level of professional technicians, the standardization degree is low, and the calculation efficiency is high are solved. And the method has the advantages of universality and standardization.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrological water resources management and supervision, and particularly relates to a calculation method, system and device for the amount of water entering rivers. Background Art

[0002] In recent years, with the rapid development of social economy and the influence of human activities, water resources are not only affected by natural factors, but also increasingly affected by human factors. In watershed-level water environment projects, when studying and analyzing river water resources, traditional research mostly focuses on the process of rainfall runoff entering rivers in each sub-watershed, ignoring the analysis of the situation of water use and discharge into rivers caused by human activities such as urban and rural areas; there is also a method of dividing the watershed into different units according to the boundaries of administrative regions. This division method is convenient for government management and monitoring, and can provide more accurate water volume data, but it ignores the hydrological and geographical characteristics within the watershed. Moreover, due to different objectives, different data, and variable data sources of the divided units, the amount of data such as water resources collected is huge, and the analysis work depends mostly on work experience, resulting in inaccurate grasp of the actual amount of water entering rivers, uncontrollable quality, low efficiency, and difficulty in having a scientific and unified method to conduct systematic and comprehensive research on the amount of water entering rivers, bringing troubles to the subsequent analysis and planning work of water resources. Therefore, there is an urgent need to propose an efficient, general and programmable calculation method for the amount of water entering rivers. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a calculation method, system and device for the amount of water entering rivers, which adopt a scientific division method to divide the area involved in the water environment project into different types of analysis units, and distinguish and calculate the amount of water entering rivers according to the types of analysis units, having the advantages of high efficiency, generality and programmability.

[0004] A calculation method for the amount of water entering rivers disclosed by the present invention includes the following steps:

[0005] Determine the research scope, the research scope includes at least one river, divide the research scope into several analysis units, at least including one analysis unit with water use, and the water use of the analysis unit includes industrial water consumption Q i , rural domestic and commercial water consumption Q r , urban domestic and commercial water consumption Q t and other water consumption Q o at least one of them;

[0006] Process and calculate the industrial water consumption Q i , rural domestic and commercial water consumption Q r , urban domestic and commercial water consumption Q t and other water consumption Q o of the analysis unit with water use to obtain the sewage volume Q s, considering the influence of underground pipe network leakage, calculate the sewage volume Q s to obtain the treated sewage volume Q p , calculate the treated sewage volume of the leaked sewage volume Q p to obtain the water volume of the sewage treatment plant entering the analysis unit Q s-t ;

[0007] Calculate the direct discharge water volume Q st into the river of the analysis unit;

[0008] Calculate the rainfall runoff water volume Q rain into the river of the analysis unit;

[0009] Summarize Q s-t , Q st and Q rain to obtain the water volume entering the river of the analysis unit;

[0010] According to the topological relationship of the river channels within the research scope, count the rivers into which the water volumes entering the river of all analysis units flow correspondingly to obtain the water volume entering the river within the research scope.

[0011] Furthermore, the analysis unit includes a watershed, a plot, and an administrative unit; the administrative unit includes a village, a town, a district, and a county. Dividing the research scope into analysis units according to the watershed, plot, or administrative unit facilitates subsequent data collection and calculation according to the analysis unit.

[0012] Furthermore, for the treatment and calculation of the industrial water consumption, rural domestic and commercial water consumption, urban domestic and commercial water consumption, and other water consumption of the analysis unit with water use, one of the water supply data survey method, population quota method, and industrial output value method is selected. The above treatment and calculation methods are easy to collect, have reliable sources, and clear data.

[0013] Furthermore, the calculation formula of the sewage volume Q s is: Q s =Q i *i i +Q r *i r +Q t *i t +Q o *i o , where: i i is the pollution production coefficient of industrial water consumption, i r is the pollution production coefficient of rural domestic and commercial water consumption, i t is the pollution production coefficient of urban domestic and commercial water consumption, i o is the pollution production coefficient of other water consumption.

[0014] Furthermore, the treated sewage volume Q pThe calculation formula for Q is: Q p = Q s * i p , where i p is the groundwater infiltration coefficient.

[0015] Furthermore, the water volume Q s-t entering the sewage treatment plant has the following calculation formula: Q s-t = Q p * i c , where i c is the sewage collection rate.

[0016] Furthermore, the water volume Q st directly discharged into the river has the following calculation formula: Q st = Q p *(1 - i c ) * i r , where: i r is the coefficient of discharge into the river.

[0017] Furthermore, the rainfall runoff volume Q rain entering the river has the following calculation formula: Q rain = R * 0.001 * A * 10 6 * α * i e , where: R is the annual rainfall, A is the area of the analysis unit, α is the runoff coefficient, and i e is the discharge ratio.

[0018] On the other hand, the present invention also provides a system for calculating the water volume entering the river, which includes:

[0019] A division module for dividing the research scope into several analysis units;

[0020] A statistical analysis module for calculating and obtaining the water volume entering the river for each analysis unit, and the water volume entering the river includes at least one of the water volume entering the sewage treatment plant, the water volume directly discharged into the river, and the rainfall runoff volume entering the river;

[0021] A distribution module for distributing the water volume entering the river of the analysis unit to the corresponding river;

[0022] A calculation module for summing up and calculating the water volume entering the river distributed to each river for each analysis unit to obtain the water volume entering the river of the rivers within the research scope.

[0023] On the other hand, the present invention also provides a device for calculating the water volume entering the river, and this calculation device includes:

[0024] A memory on which a computer program is stored;

[0025] A processor communicatively connected to the memory for executing the computer program to implement the above-mentioned method for calculating the water volume entering the river.

[0026] The present invention has the following beneficial effects:

[0027] The river entry calculation method of the present invention takes into account the influence of administrative divisions and hydrogeographical characteristics on the river entry volume, distinguishes the river entry volume of the analysis unit according to the influence of water supply and rainfall, and uses different measurement methods such as water supply data investigation method, population quota method, and industrial output value method to calculate and statistically analyze different types of water volume data, providing a more accurate water volume measurement result, solving the problem that the analysis of the river entry volume of the analysis unit seriously depends on the technical level of professional technicians, with low standardization and difficult to guarantee the quality of the results, having the advantages of universality and standardization, providing a guarantee for the efficient and general calculation work of the river entry volume of the analysis unit, and at the same time providing support for the later analysis and planning work of water resources such as water environment models, water volume balance analysis, and pollution load analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic flow chart of the river entry volume calculation method provided by some embodiments of the present invention,

[0029] Figure 2 is a schematic diagram of the research area and analysis unit division provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In order to more clearly and completely describe the technical solution of the present invention, the present invention will be further described in detail below through specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, and various changes can be made within the scope defined by the rights of the present invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] As Figure 1 shown, the present invention provides a river entry volume calculation method, which specifically includes the following steps:

[0033] Step 1: Determine the research scope and divide the analysis units. The basis for dividing the analysis units includes hydrometeorological data, topographic and geomorphic information, and administrative division information. According to the above division basis, the analysis units are divided into different types. Among them, there are analysis units with clear water use characteristics and water supply sources, such as villages, townships, districts, and towns divided according to administrative regions, or agricultural and forestry lands divided according to usage, such as livestock plots and aquaculture lands. It can also include the runoff, lakes, or reservoirs that enter rivers or other water bodies within the research scope. The research area can also be divided into multiple analysis units according to water resource utilization and underlying surface conditions, and each analysis unit has clear water use characteristics and water supply sources. The above is only an example and does not limit the analysis units, and other division types can also be included.

[0034] Step 2: For the analysis units divided in Step 1, for each analysis unit i, when the data of the analysis unit is relatively detailed, use the water supply data survey method to calculate the water use data of each analysis unit. Obtain the water use data of various users from relevant departments and institutions, including information such as water consumption, water use type, and water supply source. At the same time, collect environmental factor data such as hydrometeorological data and topographic and geomorphic information within the region. Divide the water supply data into industrial water use, urban domestic and commercial water use, rural domestic and commercial water use, and other water use according to agriculture, industry, life, and ecology.

[0035] Step 3: For the analysis units divided in Step 1, for each analysis unit i, when relevant departments and institutions have statistical survey data on the specific water consumption of each water use object in the analysis unit, classify and summarize the data according to industrial water use, urban domestic and commercial water use, rural domestic and commercial water use, and other water use to obtain industrial water consumption, urban domestic and commercial water consumption, rural domestic and commercial water consumption, and other water consumption respectively. When relevant departments and institutions do not have detailed water use data and the analysis unit lacks data, the water consumption is estimated using water use indicators, and the total water use is obtained after balancing with the water supply. For example, the population quota method and the industrial output value method are used to indirectly estimate the water use data of each analysis unit. Specifically, use the indicators of domestic water use and industrial water use announced or measured experimentally in each region, multiply them by the population quantity, industrial output value, etc. for estimation, and balance with the water supply. Among them, the experimental measurement method selects a region as the research object, tests the source generation amount of pollutants, and analyzes its laws to obtain corresponding indicators. For details, please refer to the paper "Measurement of the Pollutant Generation Amount per Capita per Day of Domestic Sewage in Urban Residents - Pollutant Generation Law" (authors: Sun Yongli, etc., "China Water & Wastewater", Vol. 36, No. 6, March 2020).

[0036] Exemplarily, the industrial output value method: Input the industrial added value and water consumption per 10,000 yuan of industrial added value of analysis unit i, and calculate the industrial water consumption of each analysis unit:

[0037] Industrial water consumption = industrial added value * water consumption per 10,000 yuan of industrial added value;

[0038] Where: industrial water consumption, unit: 10,000 m 3 ; industrial added value, unit: 10,000 yuan; water consumption per 10,000 yuan of industrial added value, unit: 10,000 m 3 .

[0039] Population quota method: Input the urban and rural population numbers of analysis unit i, and calculate the urban domestic sewage volume, rural domestic sewage volume and comprehensive domestic sewage volume Q d ;

[0040] Q d =Q a *P / 1000

[0041] Where: Q d is the water consumption, unit: 10,000 m 3 / d; Q a is the per capita water consumption quota (urban per capita water consumption quota or rural per capita water consumption quota), unit: L / (d·person); P is the population quantity, unit: 10,000 people.

[0042] In addition, the statistical plus estimation method can also be used to estimate the water consumption of each analysis unit. Agricultural water use is divided into farmland irrigation water use, fish pond and livestock and poultry water use. The water use of large and medium-sized irrigation areas in farmland irrigation water use is comprehensively counted; the water use of small irrigation areas, fish ponds and livestock and poultry is comprehensively estimated by selecting a certain number of typical cases and combining the regional irrigation area, fish pond replenishment area and livestock and poultry quantity. The water use of key industrial enterprises in industrial water use is comprehensively counted, and the water use of non-key water users is estimated by typical investigation and comprehensive estimation. Domestic water use constructs a sample network of water users by selecting typical cases, obtains the water use indicators of urban and rural residents' life, construction industry and the tertiary industry, and combines economic and social indicators such as the population, completed construction area of the construction industry and the number of employees in the tertiary industry provided by the statistical department to estimate the regional domestic water use. Other water use such as ecological environment water use includes urban and rural environmental water use, and the urban and rural environmental water use is mainly estimated according to the water use quota and the regional economic and social development situation.

[0043] Step 4, Multiply the various types of water consumption obtained in Step 2 or Step 3 by their corresponding pollution production coefficients to obtain the sewage volume Q of analysis unit i s ;

[0044] Q s =Q i *i i +Q r *i r +Q t *i t +Q o *i o

[0045] Where: Q s is the sewage volume of analysis unit i, unit: 10,000 m 3 / d; Q i is the industrial water consumption, Q r is the rural domestic and commercial water consumption, Q t is the urban domestic and commercial water consumption, Q o is the other water consumption, and the units are all: 10,000 m 3 / d; i is its corresponding pollution production coefficient, and the value range is 0 - 1. The pollution production coefficients of various types of sewage should be determined according to the historical water supply volume and sewage volume data. When the data is lacking, the pollution production coefficients of urban classified sewage can be determined according to the urban residential and public facility levels and industrial types, etc., according to the regulations of the urban classified sewage discharge coefficients in the "Code for Urban Drainage Engineering Planning" (GB 50318 - 2017); the sewage collected by the rural sewage system is mainly rural residential and commercial sewage, public facility sewage and infiltrated groundwater. For residential and commercial, public facility water use, the amount of sewage entering the drainage system depends to a large extent on the use of water supply and the completeness of the local sewage collection system. Refer to the "Technical Specification for Drainage Engineering in Towns (Rural Areas)" (CJJ124 - 2008), the "Standard for Design of Outdoor Drainage" (GB 50014 - 2021) and the local special plan, and combine with the economic development status of the analysis area to determine the rural domestic sewage discharge coefficient. According to different regions and different water use types, the pollution production coefficients will be different, and these coefficients may change due to factors such as technological progress, management improvement, and water-saving measures. Therefore, in actual applications, calculations can be adjusted according to the latest data and local specific conditions.

[0046] Step 5, since there are often different degrees of damage in the underground pipe network, which will cause groundwater to infiltrate into the pipe network system at the damaged parts. This infiltration here is different from the outward sewage discharge caused by pipe damage. The infiltration of groundwater at the damaged parts into the pipe network system is considered by introducing the infiltration coefficient to obtain the sewage volume Q p , and the infiltration rate is the ratio of the infiltration volume of groundwater to the sewage volume entering the pipe network;

[0047] Q p = Q s *i p

[0048] Where: Q p is the sewage volume considering leakage, unit: 10,000 m 3 / d; i p is the groundwater infiltration coefficient, i p ≥1.

[0049] Step 6: The sewage volume considering leakage obtained in Step 5 is multiplied by the sewage collection rate to obtain the water volume Q entering the sewage treatment plant. s-t , and this water volume is discharged into the corresponding river. The sewage collection ratio is related to the coverage rate of urban pipe networks.

[0050] Q s-t =Q p *i c

[0051] In the formula: Q s-t is the water volume entering the sewage treatment plant, with the unit of 10,000 m 3 / d; i c is the sewage collection rate. When the analysis unit with water supply does not include the sewage treatment plant, i c =0. When the analysis unit with water supply includes the sewage treatment plant, the value range is 0 - 1.

[0052] Step 7: Calculate the water volume directly discharged into the river and match each analysis unit i with the corresponding river. The calculation formula is as follows:

[0053] Q st =Q p *(1 - i c )*i r

[0054] In the formula: Q st is the water volume directly discharged into the river, with the unit of 10,000 m 3 / d; i c is the sewage collection rate; i r is the river entry coefficient. Considering that not all sewage that does not enter the sewage treatment plant is directly discharged into the river, there is a certain reduction in the directly discharged sewage that finally enters the main river in the corresponding sub - basin after transmission and interception. The river entry coefficient i r has a value range of 0 - 1. The specific value of the river entry coefficient i r can be determined by the monitoring data of water quality and water volume. When data is lacking, it can be determined according to the value - taking method in the "Guiding Opinions on the Total Allocation of Main Water Pollutants", such as determined by the distance (L) from the enterprise discharge outlet and the urban sewage treatment facility discharge outlet to the river sewage discharge outlet: when L < 1 km, the river entry coefficient takes 1.0; when 1 < L < 10 km, the river entry coefficient takes 0.9; when 10 < L < 20 km, the river entry coefficient takes 0.8; when 20 < L < 40 km, the river entry coefficient takes 0.7; when L > 40 km, the river entry coefficient takes 0.6.

[0055] Step 8: By inputting the annual rainfall, calculate the rainfall runoff into the river by analyzing the runoff coefficient, area, corresponding river, and discharge ratio within the unit area. The runoff coefficient depends on the proportion of each plot in the analysis unit and the runoff generation and concentration coefficients of different plots. The discharge ratio refers to the proportion of the runoff generated within the analysis unit area that is discharged into a certain river. Since the rivers within the analysis unit may be generalized river systems, the sum of the discharge ratios of different rivers in the same analysis unit is less than or equal to 1;

[0056] Q rain = R * 0.001 * A * 10 6 * α * i e

[0057] In the formula: Q rain is the rainfall runoff into the river, with the unit of 10,000 m 3 ; A is the area of the analysis unit, with the unit of km 2 ; α is the runoff coefficient; i e is the discharge ratio.

[0058] Step 9: Sum up the results obtained in Steps 6 - 8 to get the water volume flowing into the river for analysis unit i. Determine whether all analysis units have been traversed. If not, set i + 1 to enter the next analysis unit and repeat Steps 2 - 8 until the calculation for all analysis units is completed.

[0059] The topological relationship of river channels refers to the spatial relationship between the components in the river network, mainly including the flow direction of the river, confluence points, branching situations, and connectivity relationships. According to the topological relationship of river channels within the research scope, match the water volume flowing into the river for each analysis unit one by one to the corresponding river or runoff. Taking the rivers that need to be calculated within the research scope as the objects, sum up the water volume flowing into the river for all the analysis units that flow into the river to obtain the water volume flowing into the river within the research scope.

[0060] Taking the Figure 2 shown research area as an example, the river basin within this research area includes three rivers, namely A, B, and C. The specific steps to calculate the water volume flowing into rivers A, B, and C within this area are as follows:

[0061] Step 1: According to water resource utilization and underlying surface conditions, divide the research area into eight analysis units. Each analysis unit has clear water use characteristics and water supply sources. By default, each analysis unit has a sewage treatment plant, and the sewage treatment plant discharges into the corresponding river of the analysis unit. The analysis unit division is as Figure 2 shown.

[0062] Step 2: For the 8 analysis units divided in Step 1, for analysis units 2 and 6, there are relatively detailed data. Use the water supply data survey method to calculate the water use data for each analysis unit, as shown in Table 1.

[0063] Table 1 Water Supply Data Sheet (Unit: 10,000 m 3 / d)

[0064] Analysis unit Industrial water Commercial water Urban household water Rural household water Other water 2 13.61 2.46 17.41 5.32 0.116 6 25.32 0.34 9.77 2.15 0.112

[0065] Step 3: For the analysis units divided in Step 1, for the remaining analysis units except those in Step 2, in the case where the analysis units lack data, the water consumption data of each analysis unit is indirectly calculated using the population quota method and the industrial output value method.

[0066] Table 2 Population and Industrial Output Value Data Sheet

[0067]

[0068]

[0069] Calculate the industrial water consumption of each analysis unit by multiplying the industrial added value and the water consumption per 10,000 yuan of industrial added value in Table 2:

[0070] Industrial water consumption = Industrial added value * Water consumption per 10,000 yuan of industrial added value

[0071] In the formula: Industrial water consumption, unit: 10,000 m 3 ; Industrial added value, unit: 10,000 yuan; Water consumption per 10,000 yuan of industrial added value, unit: 10,000 m 3 .

[0072] Input the urban population and rural population numbers of analysis unit i, and calculate the urban domestic sewage volume, rural domestic sewage volume, and comprehensive domestic sewage volume using the quota value:

[0073] Q d = Q a *P / 1000

[0074] In the formula: Q d is the water consumption, unit: 10,000 m 3 / d; Q a is the per capita water consumption quota (urban per capita water consumption quota or rural per capita water consumption quota), unit: L / (d·person); P is the population quantity, unit: 10,000 people.

[0075] The urban per capita water consumption quota is 300 (L / d·person), and the rural per capita water consumption quota is 120 (L / d·person). Substitute the data in Table 2 into the above formula, and the calculation results are shown in Table 3 below.

[0076] Table 3 Water Consumption Statistical Analysis Table (Unit: 10,000 m 3 / d)

[0077] Analysis unit Industrial water Other water Urban household water Rural household water 1 8.634 0.123 1.09 1.02 3 219.127 0.461 4.95 0.468 4 57.704 0.115 1.25 1.16 5 112.030 0.327 4.52 0.89 7 72.739 0.158 1.39 1.3 8 404.444 0.956 7.62 0.95

[0078] Step 4: Multiply the various water consumption amounts obtained in Step 2 or Step 3 by their corresponding pollutant production coefficients to obtain the sewage volume of analysis unit i:

[0079] Q s =Q i *i i +Q r *i r +Q t *i t +Q o *i o

[0080] In the formula: Q s is the sewage volume of analysis unit i, with the unit of 10,000 m 3 / d; Q i is the industrial water consumption, Q r is the rural domestic and commercial water consumption, Q t is the urban domestic and commercial water consumption, Q o is the other water consumption, and the units are all 10,000 m 3 / d; i is its corresponding pollutant production coefficient, and the value range is 0 - 1. For the convenience of calculation, i i are all set to 0.5, i t are all set to 0.85, i r are all set to 0.5, i o are all set to 0.5. The calculation results are shown in Table 4.

[0081] Table 4 Statistical Analysis Table of Sewage Volume (Unit: 10,000 m 3 / d)

[0082] Analysis unit Industrial water Other water Urban household water Rural household water 1 4.317 0.0615 0.9265 0.51 2 6.805 0.058 16.8895 2.66 3 109.5635 0.2305 4.2075 0.234 4 28.852 0.0575 1.0625 0.58 5 56.015 0.1635 3.842 0.445 6 12.66 0.056 8.5935 1.075 7 36.3695 0.079 1.1815 0.65 8 202.222 0.478 6.477 0.475

[0083] Step 5: Since there are often varying degrees of damage in the underground pipe network, which will cause groundwater to seep into the pipe network system at the damaged locations. By introducing the seepage coefficient, the sewage volume considering leakage is obtained. The seepage rate is the ratio of the seepage volume of groundwater to the sewage volume entering the pipe network;

[0084] Q p =Q s *i p

[0085] In the formula: Q p is the sewage volume considering leakage, with the unit of 10,000 m 3 / d; i p is the groundwater infiltration coefficient. The groundwater infiltration coefficient is taken as 1.1, and the calculation results are shown in Table 5.

[0086] Table 5 Statistical Analysis Table of Sewage Volume Considering Leakage (Unit: 10,000 m 3 / d)

[0087]

[0088]

[0089] Step 6: The sewage volume considering leakage obtained in Step 5 is multiplied by the sewage collection rate to obtain the sewage volume entering the sewage treatment plant. This volume is discharged into the corresponding river, and the sewage collection ratio is related to the coverage rate of the urban pipe network.

[0090] Q s-t = Q p * i c

[0091] In the formula: Q s-t is the sewage volume entering the sewage treatment plant, with the unit of: 10,000 m 3 / d; i c is the sewage collection rate.

[0092] The sewage collection rate for industrial sewage is taken as 1, the sewage collection rate for urban sewage is taken as 0.65, the sewage collection rate for rural sewage is taken as 0.35, and the sewage collection rate for other sewage is taken as 0.65. Substituting into the above formula, the calculation results of the sewage volume entering the sewage treatment plant are shown in Table 6.

[0093] Table 6 Statistical Analysis Table of Sewage Volume Entering the Sewage Treatment Plant (Unit: 10,000 m 3 / d)

[0094] Analysis unit Industrial water Other water Urban household water Rural household water 1 4.7487 0.043973 0.662448 0.19635 2 7.4855 0.04147 12.07599 1.0241 3 120.5199 0.164808 3.008363 0.09009 4 31.7372 0.041113 0.759688 0.2233 5 61.6165 0.116903 2.74703 0.171325 6 13.926 0.04004 6.144353 0.413875 7 40.00645 0.056485 0.844773 0.25025 8 222.4442 0.34177 4.631055 0.182875

[0095] Step 7: Calculate the direct discharge volume into the river and match each analysis unit i with the corresponding river. The calculation formula is as follows:

[0096] Q st = Q p *(1 - i c ) * i r

[0097] In the formula: Q st is the direct discharge volume into the river, with the unit of: 10,000 m 3 / d; i c is the sewage collection rate; i r is the river entry coefficient, and the value range is 0 - 1. The river entry coefficient for urban sewage is taken as 0.9, the river entry coefficient for rural sewage is taken as 0.3, and the river entry coefficient for other sewage is taken as 0.9. The calculation results of the direct discharge sewage volume are shown in Table 7.

[0098] Table 7 Statistical Analysis Table of Direct Discharge Sewage Volume (Unit: 10,000 m 3 / d)

[0099] Analysis unit Corresponding river Industrial water Other water Urban household water Rural household water 1 B 0 0.02131 0.321032 0.109395 2 B 0 0.020097 5.852212 0.57057 3 A 0 0.079868 1.457899 0.050193 4 A 0 0.019924 0.368156 0.12441 5 C 0 0.056653 1.331253 0.095453 6 A 0 0.019404 2.977648 0.230588 7 C 0 0.027374 0.40939 0.139425 8 A 0 0.165627 2.244281 0.101888

[0100] Step 8, calculate the rainfall runoff into the river by inputting the annual rainfall, runoff coefficient, area, corresponding river and discharge ratio in the analysis unit area. The runoff coefficient depends on the ratio of each plot in the analysis unit and the runoff coefficient of different plots. The discharge ratio refers to the proportion of runoff generated in the analysis unit area that is discharged into a certain river. Since the rivers in the analysis unit may be generalized water systems, the sum of the discharge ratios of different rivers in the same analysis unit is less than or equal to 1;

[0101] Q rain =R*0.001*A*10 6 *α*i e

[0102] Where: Q rain is the amount of rainfall runoff into the river, unit: 10,000 m 3 ; R is annual rainfall, unit: mm; A is the analysis unit area, unit: km2; α is the runoff coefficient; i e The annual rainfall is 1200 mm, the runoff coefficient is 0.55, and the discharge ratio is 0.58. Substitute them into the above formula and the results are shown in Table 8.

[0103] Table 8 Rainfall runoff into rivers (unit: 10,000 m 3 )

[0104] Analysis unit Runoff coefficient Area (km2) Corresponding river Emission ratio <![CDATA[Inflow into the river (10,000 m 3 )]]> 1 0.55 192.044 B 0.58 7351.4443 2 0.55 167.475 B 0.58 6410.943 3 0.55 166.63 A 0.58 6378.5964 4 0.55 318.09 A 0.58 12176.4852 5 0.55 201.11 C 0.58 7698.4908 6 0.55 239.82 A 0.58 9180.3096 7 0.55 391.691 C 0.58 14993.9315 8 0.55 266.49 A 0.58 10201.2372

[0105] Step 9: The sum of the results of steps 6-8 is the water inflow of analysis unit i. It is determined whether all analysis units have been traversed. If not, i+1 is entered into the next analysis unit, and steps 2-8 are repeated until all analysis units are calculated. The corresponding relationship between each analysis unit and the three rivers A, B, and C is shown in Table 9. The final results of the water inflow of each analysis unit are shown in Table 10.

[0106] Table 9 Correspondence between rivers and analysis units

[0107]

[0108] Table 10 Statistics of river inflow in analysis units

[0109]

[0110] In this example, rivers B and C merge into river A. Therefore, the flow rate at the outlet of river A is the sum of the three. The sum of the inflow of rivers A, B, and C and the inflow from outside the region is converted into the flow rate at the outlet of river A: QA total = QA + QB + QC = 120.0578m 3 / s, compared with the multi-year average flow of 116.78m measured by the downstream station of River A. 3 / s for comparison, and the two values are very close, indicating that the calculated river inflow obtained by using the river inflow calculation method provided by the present invention is basically consistent with the actual river inflow. The river inflow calculation method provided by the present invention can provide a relatively accurate water volume measurement result.

[0111] On the other hand, the present invention also provides a river inflow calculation system, which includes: a division module, a statistical analysis module, an allocation module, and a calculation module. Among them, the division module is used to divide the research scope into several analysis units; the statistical analysis module is used to calculate and obtain the river inflow of each analysis unit, and the river inflow includes at least one of the water volume entering the sewage treatment plant, the water volume directly discharged into the river, and the rainfall runoff into the river; the allocation module is used to allocate the river inflow of the analysis unit to the corresponding river to obtain the river inflow of each river within the research scope; the calculation module is used to summarize and calculate the river inflow allocated from each analysis unit to each river.

[0112] On the other hand, the present invention also provides a river inflow calculation device, which includes: a memory on which a computer program is stored; a processor communicatively connected to the memory for executing the computer program to implement the river inflow calculation method as described above.

[0113] In the description of this specification, the specific features, structures, materials, or characteristics in the embodiments or examples can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0114] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. A method for calculating the inflow into a river, characterized in that, Including the following steps: Determine the research scope, which includes at least one river. Divide the research scope into several analysis units, including at least one analysis unit with water use. The water use of the analysis unit includes industrial water consumption Q i , rural domestic and commercial water consumption Q r , urban domestic and commercial water consumption Q t and other water consumption Q o at least one of them; For the industrial water consumption Q of the analysis unit with water usage i , the rural domestic and commercial water consumption Q r , the urban domestic and commercial water consumption Q t and other water consumption Q o , after processing and calculating, the sewage volume Q of the analysis unit is obtained s . Considering the influence of underground pipeline network leakage, the sewage volume Q s is processed and calculated to obtain the treated sewage volume Q p . The leaked sewage volume Q p is processed and calculated to obtain the water volume Q entering the sewage treatment plant of the analysis unit s-t ; The direct water volume Q discharged into the river by the calculation and analysis unit st ; Rainfall runoff into the river volume Q of the calculation and analysis unit rain ; Summary Q s-t , Q st and Q rain to obtain the water inflow into the river of the analysis unit; According to the topological relationship of the river channels within the research scope, sum up the river inflows corresponding to all analysis units flowing into the rivers to obtain the river inflows within the research scope.

2. The river inflow calculation method according to claim 1, characterized in that, The analysis units include river basins, plots, and administrative units; the administrative units include villages, towns, districts, and counties.

3. The river inflow calculation method according to claim 1, characterized in that, The industrial water consumption Q of the analysis unit with water use i , the rural domestic and commercial water consumption Q r , the urban domestic and commercial water consumption Q t and other water consumption Q o One of the water supply data survey method, population quota method and industrial output value method is selected for the processing calculation.

4. The river inflow calculation method according to claim 1, characterized in that, The sewage volume Q s has the following calculation formula: Q s = Q i * i i + Q r * i r + Q t * i t + Q o * i o , where: i i is the pollution production coefficient of industrial water consumption, i r is the pollution production coefficient of rural domestic and commercial water consumption, i t is the pollution production coefficient of urban domestic and commercial water consumption, i o is the pollution production coefficient of other water consumption.

5. The river inflow calculation method according to claim 1, characterized in that The treated sewage volume Q p has the following calculation formula: Q p = Q s * i p , where: i p is the groundwater infiltration coefficient.

6. The river inflow calculation method according to claim 1, wherein The influent water volume Q into the sewage treatment plant s-t has the following calculation formula: Q s-t = Q p * i c , where i c is the sewage collection rate.

7. The river inflow calculation method according to claim 1, characterized in that The direct river discharge volume Q st has the following calculation formula: Q st = Q p *(1 - i c )*i r , where: i r is the river inflow coefficient.

8. The river inflow calculation method according to claim 1, characterized in that, The rainfall runoff into the river volume Q rain The calculation formula is: Q rain = R * 0.001 * A * 10 6 * α * i e , where: R is the annual rainfall, A is the analysis unit area, α is the runoff coefficient, i e is the discharge ratio.

9. A river inflow calculation system, characterized in that, The system includes: A division module for dividing the research scope into several analysis units; A statistical analysis module for calculating and obtaining the water volume entering the river for each analysis unit, where the water volume entering the river includes at least the water volume Q entering the sewage treatment plant s-t 、the water volume Q directly discharged into the river st 、and the rainfall runoff volume Q entering the river rain ; and one of them An allocation module for allocating the river inflows of the analysis units to the corresponding rivers; A calculation module for summarizing and calculating the river inflows allocated from each analysis unit to each river to obtain the river inflows within the research scope.

10. A river inflow calculation device, characterized in that, The computing device includes: A memory storing a computer program thereon; A processor communicatively connected to the memory for executing the computer program to implement the river inflow calculation method according to any one of claims 1-8.

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