Non-Point Source Nitrogen and Phosphorus Assessment and Management Plan with an Improved Method in Data-Poor Regions

Chen, Xuekai; Liu, Xiaobo; Peng, Wenqi; Dong, Feifei; Huang, Zhihua; Wang, Ruonan

doi:10.3390/w10010017

Cited by 17 publications

(18 citation statements)

References 51 publications

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“…The values can be estimated using the export coefficient model (ECM). The adsorbed NPS pollutants are mainly controlled by soil erosion and they can be estimated using the Revised Universal Soil Loss Equation (RUSLE) [12].…”

Section: Estimation Of Nps Pollutants Amountsmentioning

confidence: 99%

“…Simulation, estimation, and quantitative measurement are the basis for effective treatment of NPS pollution [11]. Many studies have shown that traditional terminal management technologies for point source pollution control is hard to effectively apply to NPS source pollution control [12]. With the rapid development of science and methodology, particularly the wide application of remote sensing, Global Positioning System, and Geographic Information System (3S) technologies, a large amount of NPS pollution estimation models have been introduced, which could be separated into physical models and empirical models.…”

mentioning

confidence: 99%

“…As these models are maneuverable and require less data, they have been widely used [17]. According to its move features, NPS pollution could be divided into dissolved class and adsorbed class [12,18]. For dissolved NPS pollution estimation, the export coefficient model (ECM) has been found the most effective [19].…”

mentioning

confidence: 99%

“…The RUSLE model makes it more convenient and available to assess soil erosion and its spatial distribution [25,26]. The ECM and RUSLE can be combined to estimate NPS pollution more accurately and effectively [12].…”

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confidence: 99%

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Temporal and Spatial Changes of Non-Point Source N and P and Its Decoupling from Agricultural Development in Water Source Area of Middle Route of the South-to-North Water Diversion Project

et al. 2019

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The quantitative estimation of non-point source (NPS) pollution provides the scientific basis for sustainability in ecologically sensitive regions. This study combined the export coefficient model and Revised Universal Soil Loss Equation to estimate the NPS nitrogen (NPS-N) and NPS phosphorus (NPS-P) loads and then evaluated their relationship with Primary Industrial Output Value (PIOV) in the water source area of the middle route of South-to-North Water Diversion Project (SNWDP) for 2000-2015. The estimated results show that: (1) dissolved nitrogen (DN) load increased 0.55%, and dissolved phosphorus (DP) load decreased 4.60% during the 15 years. Annual loads of adsorbed nitrogen (AN) and adsorbed phosphorus (AP) increased significantly before 2005 and then decreased after 2005. Compared with 2000, AN and AP loads in 2015 significantly decreased by 32.72% and 30.81%, respectively. Hanzhong Basin and Ankang Basin are key areas for controlling dissolved pollution, and southern and northern regions are key areas for adsorbed pollution. (2) From 2000 to 2005, NPS pollutants and PIOV showed weak decoupling status. By 2015, NPS pollutants had strong decoupling from PIOV in most counties. (3) Land use has been the main source of NPS-N and NPS-P pollution, accounting for about 75% of NPS-N and 50% of NPS-P based on the average value over the study period. In the future, various measures-such as returning cropland to forest and reducing the number of livestock-could be adopted to reduce the risk of NPS pollution. NPS pollution caused by livestock was grown over the past 15 years and had not yet been effectively controlled, which still needs to be urgently addressed. Collecting ground monitoring data and revising parameters are effective means to improve the accuracy of simulation, which deserve further study. The results will also provide scientific support for sustainable development in similar regions.Sustainability 2019, 11, 895 2 of 23 causes of water pollution [3]. Due to the attention received by the community, point source pollution has, for the most part, been effectively curbed, and NPS pollution has gradually become the dominant contributor to water pollution. Non-point source pollution has always been an important factor affecting water quality in the United States [4]. To solve the problem, since 1990, the United States government has invested over $100 million annually on average to solve the problem [5]. In Miksa City, Japan, 61.5% of the nitrogen load comes from non-point source pollution caused by high-intensity agricultural activities [6]. According to the First National Pollution Census Bulletin, NPS nitrogen and phosphorus loads from Chinese agricultural sources in watersheds account for 57.19% and 67.27% of total nitrogen and total phosphorus pollution, respectively [7,8]. Non-point source nitrogen and phosphorus lead to eutrophication and the decrease in dissolved oxygen in surface water, which not only damages the aquatic environment and the balance of the ecosystem, but also seriously affects the qu...

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Section: Estimation Of Nps Pollutants Amountsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Temporal and Spatial Changes of Non-Point Source N and P and Its Decoupling from Agricultural Development in Water Source Area of Middle Route of the South-to-North Water Diversion Project

et al. 2019

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“…The world is facing more and more serious water pollution problems, and non-point source (NPS) pollution has gradually become the most significant factor [1]. Both anthropogenic factors and ecological factors have a major impact on NPS pollution.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Effects of Anthropogenic Factors on Nonpoint Source Pollution in the Upper Reaches of the Yangtze River

Ding

Liu

2019

Sustainability

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With the continuous enhancement of point source pollution control, non-point source (NPS) pollution has become an important factor in the deterioration of surface water quality. Meanwhile, due to the soaring global population, long-term effects of anthropogenic factors on non-point source pollution in large river basins have increasingly attracted worldwide attention. The Yangtze river is the largest river basin of China, and protecting its ecological environment has great significance on protecting the lifeline of the entire Yangtze river. In this study, the improved output coefficient and nutrient losses empirical model were used to conduct space–time simulations of non-point source pollution in the upper reaches of the Yangtze river (URYR) based on GIS during 1960–2003. This method reveals the anthropogenic effects of non-point source pollution in the upper reaches of the Yangtze river. The results indicate that the impacts of anthropogenic factors on dissolved pollutants increased significantly, while those on sediment and adsorbed pollutants increased first and then decreased during the simulation year. Agricultural land use and atmospheric deposition, as well as rural life, were the main sources of dissolved pollutants. In addition, dry land and paddy fields were the major sources of sediment and adsorbed pollutants. For the load intensities, the long-term effects of anthropogenic factors on dissolved pollutants increased rapidly, and those on the load intensity of sediment and adsorbed pollutants increased first and then decreased. Therefore, the study would propose some corresponding environmental management measures to strengthen environmental protection and non-point source pollution control in the upper reaches of the Yangtze river.

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Agricultural support and contaminated spillovers: The effects of agricultural water pollution on adult health in China

Villa

2021

Applied Eco Perspectives Pol

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Using rich longitudinal data combined with administrative water quality data from China, we examine the causal impact of agricultural water pollution on adult health outcomes. To obtain exogenous variation in agricultural water pollution, we use a quasi‐experimental design and exploit a series of agricultural support policies enacted in China in the mid‐2000s. We find that agricultural water pollution worsens health outcomes through increased incidence of morbidity and lower body mass index. We additionally find these adverse health effects largely operate through contaminated drinking water and are thus primarily born by those without access to water treated at a water plant.

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Non-Point Source Nitrogen and Phosphorus Assessment and Management Plan with an Improved Method in Data-Poor Regions

Cited by 17 publications

References 51 publications

Temporal and Spatial Changes of Non-Point Source N and P and Its Decoupling from Agricultural Development in Water Source Area of Middle Route of the South-to-North Water Diversion Project

Temporal and Spatial Changes of Non-Point Source N and P and Its Decoupling from Agricultural Development in Water Source Area of Middle Route of the South-to-North Water Diversion Project

Long-Term Effects of Anthropogenic Factors on Nonpoint Source Pollution in the Upper Reaches of the Yangtze River

Agricultural support and contaminated spillovers: The effects of agricultural water pollution on adult health in China

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