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Water quality model based low-pollution water ecological purification effect evaluation method

A technology of ecological purification and water quality model, applied in the field of pre-evaluation, can solve problems such as pre-evaluation of the effect of ecological purification schemes

Inactive Publication Date: 2014-04-23
NANJING UNIV
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Problems solved by technology

This invention can solve the problem of pre-evaluation of the effect of ecological purification schemes in dendritic polluted rivers

Method used

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  • Water quality model based low-pollution water ecological purification effect evaluation method
  • Water quality model based low-pollution water ecological purification effect evaluation method
  • Water quality model based low-pollution water ecological purification effect evaluation method

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0122] Taking the Tianlai River in Nanjing University as an example, the study was carried out.

[0123] Tianlai River is an inland river located in the urban area of ​​Nanjing (see attached image 3 ), is a tributary of the Jiuxiang River, and finally flows into the Yangtze River at the foot of Qixia Mountain in Nanjing. Although water pollution control has been carried out many times in recent years, the water quality is often in the fifth category of the surface water quality standard every summer and rainy season, seriously affecting the surrounding ecological landscape. The source water quality data of Tianlai River are shown in Table 2.

[0124] Table 2 Data values ​​of headwater water quality of Tianlai River

[0125] water quality index

Nitrate

Ammonia nitrogen

organic nitrogen

organophosphate

Inorganic phosphorus

dissolved oxygen

Concentrationmg / L

2.85

2.15

1.59

0.74

0.419

1.3

[0126] According...

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Abstract

The invention relates to a water quality model based low-pollution water ecological purification effect evaluation method which includes acquiring degradation parameter, aiming at a water quality index needed to be inspected, of each purification unit according to tests, building a QUAL2K model of a selected low-pollution tail race river channel according to survey and monitoring data thereof and then verifying the QUAL2K model, inputting the parameters acquired through the tests into the built model, running the model to acquire outlet water quality of the tail race river channel, and thereby performing effect pre-evaluation and screening according to different ecological purification technology combination schedules. The water quality model, namely the QUAL2K model, is applicable to migration and transformation of pollutants in middle and small river channels with moderate width-depth ratio; generally, as the length of the tail race river channels is much larger than width and depth, pollutants are easy to be mixed in water transversely and vertically; further, the longitudinal change of the pollutants is remarkable, the pollutants are delivered to the downstream mainly by means of longitudinal migration, and simulated conditions of one-dimensional steady-stage model are met.

Description

technical field [0001] The invention is applicable to the pre-evaluation of the ecological purification effect of the low-pollution tail water channel, and is an effect evaluation method based on the water quality model. Background technique [0002] In recent years, with the rapid economic development and high population concentration in the Taihu Lake Basin, the pollution load has intensified. A large amount of water with a low pollution concentration that meets the standard is discharged into the surface water body. The water quality has reached the discharge standard, but some important indicators are lower than the standard of surface water V, which is difficult to connect with the surface water quality, resulting in rivers and lakes. The ecological system of the water body has been seriously degraded, the water environment capacity of the river network has declined, its original environmental functions have basically been lost, the water body environment has been serio...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 钱新朱文婷张瑞斌高海龙
Owner NANJING UNIV