Application of Export Coefficient Model and QUAL2K for Water Environmental Management in a Rural Watershed
Application of Export Coefficient Model and QUAL2K for Water Environmental Management in a Rural Watershed
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出口系数模型和QUAL2K在农村流域水环境管理中的应用
DOI：
10.3390/su11216022
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发表时间：
2019-10
期刊：
影响因子：
3.9
通讯作者：
Zhang Chi
中科院分区：
文献类型：
--
作者：
Xin Zhuohang;Ye Lei;Zhang Chi
各种点源和非点源排放的过量营养物造成的水质恶化是一个全球性挑战。了解污染源及其各自的贡献是环境规划、管理和恢复的先决条件。以大连市登沙河流域为研究对象，研究了复合污染源对该流域水质的影响。将输出系数法与2K水质模型相结合，估算了不同来源的氨氮（NH 4-N）和总磷（TP）负荷，并探讨了其各自的贡献。结果表明，畜禽养殖场和农作物生产是NH 4-N的主要来源，而农作物生产、土壤侵蚀和畜禽养殖场是TP的3大来源，年贡献率为98.4%。污染物负荷表现出年内变化，主要是由于降雨和人为农业活动的季节性。综合考虑各污染源，提出了水污染控制和治理的建议。该研究为流域管理者在可持续水环境管理中应用W2 K模型结合输出系数模型提供了一种新的思路，可为其他农村中小流域的水环境管理提供参考。
Water quality deterioration caused by excessive nutrient discharge from various point and non-point sources are a global challenge. Understanding the pollution sources and their respective contribution is the prerequisite for environmental planning, management and restoration. In this study, the influence of complex pollution sources on the water quality of the Dengsha River watershed in Dalian, China, was investigated. The export coefficient method was coupled with the QUAL2K water quality model to estimate the loads of ammonia nitrogen (NH4-N) and total phosphorus (TP) from different sources, and to explore their respective contributions. Results indicated that animal feedlot and crop production were major sources for NH4-N load, and crop production, soil erosion and animal feedlot are the largest three sources of TP load with an annual total contribution of 98.4%. The pollutant load exhibited an intra-annual variation mainly due to the seasonality of rainfall and anthropogenic agricultural activities. The overall waste assimilation capacity (WAC) is overloaded and suggestions for water pollution control and treatment regarding each pollution source were proposed. This study addressed a new application of QUAL2K model coupled with the export coefficient model for watershed managers towards a sustainable water environmental management, and can therefore be a reference example for other small and medium-sized rural watersheds.
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DOI：
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发表时间：
1978
期刊：
--
影响因子：
--
作者：
W. H. Wischmeier;D. Smith
通讯作者：
W. H. Wischmeier;D. Smith
影响因子：
8.7
作者：
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Yin, YY
影响因子：
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作者：
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通讯作者：
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DOI：
10.1007/s11270-014-2122-7
发表时间：
2014-09
期刊：
Water, Air, & Soil Pollution
影响因子：
--
作者：
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通讯作者：
Madjid Delkash;F. Al-Faraj;M. Scholz
影响因子：
3.6
作者：
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通讯作者：
E. J. Didoné;J. Minella;G. Merten