SCSIO OpenIR  > 热带海洋环境国家重点实验室(LTO)
Evaluation of Distribution Properties of Non-Point Source Pollution in a Subtropical Monsoon Watershed by a Hydrological Model with a Modified Runoff Module
Zhang, Zhou; Huang, Ping; Chen, Zhonghan; Li, Junmin1
2019
Source PublicationWATER
ISSN2073-4441
Volume11Issue:5Pages:993
AbstractNon-point source pollution (NPS) is difficult to manage for watersheds, due to the scattering of pollution sources and uncertainty over the time it takes to accumulate. Since local agriculture and poultry rearing prevail, NPS occupies a large proportion of local pollution. In this paper, we modified the runoff module of the Soil and Water Assessment Tool (SWAT) to study the distribution properties and the effect of control of NPS in the Binjiang watershed in Southern China. The model was run from 2005 to 2014. The runoff simulation's accuracy had apparently improved compared to the original model, as the Nash coefficient (Ens) had improved from 0.72 to 0.89, and the determination coefficient (R-2) had improved from 0.75 to 0.91, an improvement in accuracy of 23.61% (Ens) and 21.33% (R-2). Thus, the modified model (SWAT-m) is more adaptable for the simulation of extensive non-urban watersheds in subtropical monsoon climates. The validated model was used in further analysis. The results show that 82-90% of total nitrogen and 83-89% of total phosphorus were concentrated in the period from April to September annually. Through the introduction of the pollution generation potential parameter phi(i), we obtained the descending order of all sub-basins in terms of their pollution generation potential. The critical source areas (CSAs) were found to be the northeast sub-basins in lower terrain that is used mainly for agricultural applications, accounting for 53% of the total watershed. The accumulation time is April to July, occupying 69% of annual generation. The simulation of management measures showed that NPS control has a good effect, with a 15 m filter strip in CSAs. Ammonia nitrogen and total phosphorus can be reduced apparently by 32% and 43%, respectively. The results may provide support for the management of NPS in watersheds under similar conditions.
DepartmentLTO
Keywordnon-point source critical source areas watershed runoff simulation distributed hydrological model SWAT
DOI10.3390/w11050993
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17725
Collection热带海洋环境国家重点实验室(LTO)
Affiliation1.Sun Yat Sen Univ, Dept Environm Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China
2.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Zhou,Huang, Ping,Chen, Zhonghan,et al. Evaluation of Distribution Properties of Non-Point Source Pollution in a Subtropical Monsoon Watershed by a Hydrological Model with a Modified Runoff Module[J]. WATER,2019,11(5):993.
APA Zhang, Zhou,Huang, Ping,Chen, Zhonghan,&Li, Junmin.(2019).Evaluation of Distribution Properties of Non-Point Source Pollution in a Subtropical Monsoon Watershed by a Hydrological Model with a Modified Runoff Module.WATER,11(5),993.
MLA Zhang, Zhou,et al."Evaluation of Distribution Properties of Non-Point Source Pollution in a Subtropical Monsoon Watershed by a Hydrological Model with a Modified Runoff Module".WATER 11.5(2019):993.
Files in This Item:
File Name/Size DocType Version Access License
Evaluation of Distri(8203KB)期刊论文出版稿开放获取CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.