A Method for Analyzing Annual Average Runoff of Rivers Based on Longitude and Latitude Projection
An analysis method and technology of runoff flow, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve difficult problems such as flow vectorization, and achieve the effect of reliable data support and reliable data support
Active Publication Date: 2017-11-24
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology
[0004] The current calculation method for the average runoff of a river for many years is oriented to different runoff directions in each section of the entire river, and it is difficult to solve the problem of flow vectorization
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[0032] Combine below figure 1 , the present invention is further described:
[0033] Calculation steps of the vector analysis method for the annual average runoff of rivers:
[0034] (1) Calculate the projected components of the annual average runoff of different runoff stations in the direction of latitude and longitude;
[0035] The projected components of the annual average runoff in the direction of the latitude and longitude of each runoff station are calculated by projection analysis method. attached figure 1 Medium Q n is the annual average runoff of the nth runoff station, θ is the angle between the runoff direction and the latitude in the east-to-north direction, Q n The components in the direction of latitude and longitude can be calculated by formula (1) and formula (2):
[0036] Q xn =Q n · cosθ (1)
[0037] Q yn =Q n · sinθ (2)
[0038] In the formula: Q xn Indicates the projected component of the annual average runoff of the nth runoff station in the ...
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The invention relates to an annual average runoff analysis method of a river on the basis of warp and weft projection. The annual average runoff analysis method comprises the following steps: 1) determining the annual average runoff Qn of different runoff stations of one river; 2) projecting the annual average runoff of each runoff station according to a warp and weft direction to obtain the warp and weft projection direction component of the annual average runoff of each runoff station; 3) independently summing the runoff projection direction components of a warp and weft direction, obtaining an average value, and obtaining the warp and weft direction projection of the annual average runoff of the river; and 4) carrying out vector summing on the warp and weft direction projection of the annual average runoff of the river to obtain the vector value of the annual average runoff of the river. The annual average runoff analysis method avoids errors caused by the simple summing of the annual average runoff of survey stations of different vector directions, and meanwhile, the calculation method is scientific and reasonable and has a remarkable practical meaning in drainage basin water resource configuration and ecological environment protection.
Description
technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for analyzing the multi-year average runoff of rivers based on longitude and latitude projection. Background technique [0002] Rivers are the spatial integrators of the hydrological process in the basin. River runoff is not only an important part of the terrestrial water cycle and water balance, but also the most valuable and easily exploitable water resource. The amount of surface water resources mainly depends on the river runoff. Hydrologists divide runoff into natural and measured runoff. Natural runoff reflects the water supply capacity of river runoff, is a potential water resource, and is also a comprehensive reflection of regional, especially closed basin precipitation and the conditions of production and confluence. Therefore, natural runoff has been valued by people and has become one of the important contents of water science research. The ...
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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 刘佳李传哲王建华王锡曚于福亮田济扬史婉丽李义豪
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES