STUDY ON CALCULATION METHOD SYSTEM OF POLLUTANT LOAD FROM NON-POINT SOURCE INTO RIVERS IN BEIJING

WANG Xuelian; LIU Bo; ZHAO Changsen; HUANG Zhenfang; PAN Xu

doi:10.13205/j.hjgc.202203025

Volume 40 Issue 3

Mar. 2022

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WANG Xuelian, LIU Bo, ZHAO Changsen, HUANG Zhenfang, PAN Xu. STUDY ON CALCULATION METHOD SYSTEM OF POLLUTANT LOAD FROM NON-POINT SOURCE INTO RIVERS IN BEIJING[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(3): 166-172,211. doi: 10.13205/j.hjgc.202203025

Citation:

WANG Xuelian, LIU Bo, ZHAO Changsen, HUANG Zhenfang, PAN Xu. STUDY ON CALCULATION METHOD SYSTEM OF POLLUTANT LOAD FROM NON-POINT SOURCE INTO RIVERS IN BEIJING[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(3): 166-172,211. doi: 10.13205/j.hjgc.202203025

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STUDY ON CALCULATION METHOD SYSTEM OF POLLUTANT LOAD FROM NON-POINT SOURCE INTO RIVERS IN BEIJING

doi: 10.13205/j.hjgc.202203025

1. Beijing Hydrological Center, Beijing 100089, China;
2. Beijing Normal University, Beijing 100875, China

Received Date: 2021-01-28
Available Online: 2022-07-07

Abstract

Abstract

In this study, the Nansha River Basin in the urban-rural fringe of Beijing was selected, and the inflow concentration of non-point source pollution in the typical area was calculated with traditional export coefficient method and the EcoHat-NPS model method, respectively. The point source and non-point source pollution were separated by using one-dimensional water quality model, and the calculated value of non-point source concentration in each estuary was calculated based on the measured non-point source concentration. The accuracy of the calculation results of the two methods was compared and analyzed. The results showed that:1) there was a plain calculation accuracy in the export coefficient method and a good calculation accuracy in the EcoHat-NPS model simulation method. The average simulation accuracy R² of the four pollutants (COD, NH₃-N, TP, TN) was 0.83, 0.94, 0.94, 0.82, respectively. The simulation effect of NH₃-N and TP was better, followed by COD and TN; 2) the inflow COD, NH₃-N, TN and TP calculated by export coefficient method was 1110.9, 70.9, 391.8, 5.02 t/a, respectively; while that of the EcoHat-NPS model method was 1403.34, 78, 388.2, 7.3 t/a, respectively; 3) Ecohat-NPS model with the flexible calculation time scale could identify the main non-point source pollution areas, which was more suitable for the estimation of non-point source pollution in Beijing. After the further data refining, it could be extended to the whole city's rivers for the estimation of non-point source pollution in Beijing.
- non-point source pollution,
- amount of pollutant load into the river,
- computation method,
- Beijing

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References(31)

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