Characteristics of Non-Point Source Pollution under Different Land Use Types

Yang, Jun; Liang, Jiping; Yang, Gaihe; Feng, Yongzhong; Ren, Guangxin; Ren, Chengjie; Han, Xinhui; Wang, Xiaojiao

doi:10.3390/su12052012

Cited by 27 publications

(10 citation statements)

References 29 publications

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“…In addition, a number of medium-and short-term development goals, such as water saving and conservation projects or technological measures for water resource exploitation, utilization, reasonable allocation, and control, should be adjusted in a timely manner through a series of response measures by both the government and the water authorities of Beijing. Specifically, from the point of social factors, the deconstruction of the noncapital functions of Beijing should be implemented continuously, since the effects of population reduction are conspicuous; in an economic development aspect, a great promotion in the deep transformations of the development pattern, restructured economy, and upgrading of the industrial structure to reduce the industrial scale involved in high water consumption and high pollution are essential; from the perspectives of scientific and technological factors, measures aimed at improving the water usage efficiency in the industry and agriculture, increasing the ratio of wastewater treatments, controlling the emissions of agricultural nonpoint source nutrients, and improving the comprehensive utilization capacity of rain should be upgraded [97][98][99][100]. Moreover, the consciousness of saving water should be established deeply by educating and propagating in the cultural aspects [101].…”

Section: Discussionmentioning

confidence: 99%

Sustainability Assessment of Water Resources in Beijing

Yang

2020

Water

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A sustainability assessment of water resources is essential for maintaining regional sustainable development. In this study, a comprehensive assessment of changes in the sustainability of the water resource system in Beijing from 2008 to 2018 was conducted on the basis of the driver-pressure-state-impact-response (DPSIR) model. To reflect the impacts of humans on the water consumption and pollution of water resources, the water footprint was considered. In addition, key factors that affect the sustainability of water resources were filtered by the modified entropy method. The results indicated that all drivers, pressures, states, impacts, and responses demonstrated increasing tendencies. As a result, a remarkable improvement in the sustainability of the water system, which was mitigated from an alert state to a good state, was achieved due to the comprehensive effect of the indexes. From these results, we inferred that the sustainability of regional water resources could only be achieved through a comprehensive consideration of regional social, economic, and environmental water systems and climate change. Therefore, formulating medium- and long-term urban, economic, and water development plans and adjusting medium- and short-term water utilization programs could contribute to the sustainable utilization of regional water resources.

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Section: Discussionmentioning

confidence: 99%

Sustainability Assessment of Water Resources in Beijing

Yang

2020

Water

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“…Nitrate is highly mobile and leachable. It has been established that excessive application of N leads to nitrate pollution of groundwater and surface water [19,20]. Phosphorus can be transported to water bodies via storm run-off in dissolved and particulate forms [2].…”

Section: Introductionmentioning

confidence: 99%

Towards to understanding the preliminary loss and absorption of nitrogen and phosphorus under different treatments in cotton drip- irrigation in northwest Xinjiang

Pan

et al. 2021

PLoS ONE

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Drip irrigation under plastic mulch is widely used in Xinjiang, Northwest China. It can not only save water, but also reduce nutrient loss and improve fertilizer utilization. However, it is not clear whether the leaching occurs or not, what is the leaching amount? What is the relationship among fertilization, irrigation regimes, loss, cotton absorption, and cotton field under different fertilization and irrigation management under drip irrigation? Studying these issues not only provides reference for the formulation of fertilization and irrigation systems, but also is of great significance for reducing non-point source pollution. A long-term positioning experiment was conducted from 2009 to 2012 in Baotou Lake farm in Korla City, Xinjiang, with drip-irrigated cotton (Gossypium hirsutum L.) under different N fertilizer and irrigation amounts. The treatments were designed comprising Control (CK,0 N, 0 P, and 0 K with an irrigation of 480 mm) and the following three other treatments: (1) Conventional fertilize and irrigation (CON, 357 kg N hm–2, 90 kg P hm–2, 0 kg K hm–2, and irrigation of 480 mm); (2) Conventional fertilization and Optimizing irrigation (OPT, 357 kg N hm–2, 90 kg P hm–2, 62 kg K hm–2, and irrigation of 420 mm); and (3) Optimizing fertilization and irrigation (OPTN, 240 kg N hm–2, 65 kg P hm–2, 62 kg K hm–2, and irrigation of 420 mm). The results found that the leaching would occur in arid area under drip irrigation. The loss of total N, NH4+, P, N and P loss coefficient was higher under conventional fertilize and irrigation treatment while the loss of NO3- was higher under conventional fertilization and optimizing irrigation treatment. The correlations among N, P absorption by cotton, loss of NH4+ and total phosphorus were quadratic function. The total nitrogen loss and cumulative nitrogen application was lineally correlated. The loss of NO3- and cumulative nitrogen application was exponential. The nitrogen and phosphorus absorption by cotton under conventional fertilization and optimizing irrigation treatment was 24.53% and 35.86% higher than that in conventional fertilize and irrigation treatment, respectively. The cotton yield under conventional fertilization and optimizing irrigation treatment obtained higher than that in other three treatments. Therefore, the conventional fertilization and optimizing irrigation treatment was the optimal management of water and fertilizer in our study. These results demonstrate that reasonable water, nitrogen and phosphorus fertilize could not only effectively promote the absorption of nitrogen and phosphorus, but also reduce nitrogen and phosphorus losses under drip fertigation and plastic mulching.

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“…NO3is low toxic but it might endogenously convert to nitrite (NO2 -), which becomes toxic to human health and aquatic organisms [33, 34, and 35]. Nitrogenous fertilizers from non-point source pollution is critical in ecosystem [36] and in agro-ecosystems, surface water pollution was strictly related to agricultural action. The result indicated that there were significant differences in total phosphorus and ortho-P content among the studied villages and between two agricultural practices in wet season.…”

Section: Physical and Chemical Parametersmentioning

confidence: 99%

Water Quality Monitoring in Inle Lake, Myanmar from the Floating Garden Activity

Khaung

Iwai

Chuasavathi³

2021

Mal. J. Fund. Appl. Sci.

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Inle Lake is the second largest inland lake in Myanmar. Floating gardens, mostly for tomato cultivation, are a unique and profitable method of agriculture used by people living on and around the lake. This study investigated the water quality of Inle Lake and how it has been affected by the different agricultural practices used in tomato cultivation on floating garden beds, by measuring pollution levels. Water samples were collected from the sites representing two types of agricultural practice from four villages. The first was designated as being grown under good agricultural practices (GAP), and the other as under non-good agricultural practices (non-GAP), with this study undertaken during wet season, 2019 and dry season, 2020. Two additional sets of water samples were collected as references. One of these sets was from the center of the lake and the other from an inlet stream to the lake. All water samples were analyzed for physical and chemical properties. The results found that Ca2+, Mg2+ and HCO3- were dominant in the lake surface water. The results showed significant differences in the mean values for some water quality parameters between the GAP and non-GAP of each study sites in both seasons. In particular, nutrient pollution from chemicals such as nitrogen and phosphorus from the non-GAP were significantly higher than those from GAP. Water quality index was calculated to describe the overall quality of lake surface water. It was observed that the water quality was almost threatened in the floating garden areas. In comparison between two practices, the non-GAP gave the higher water quality index value than the GAP. This investigated that poor management of fertilizers usage has had a negative effect on the water quality of the lake. The differences seen in water quality from the GAP and non-GAP areas, point to ways to successfully manage sources of water pollution in order to better conserve the lake by sustainable agricultural production.

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Characteristics of Non-Point Source Pollution under Different Land Use Types

Cited by 27 publications

References 29 publications

Sustainability Assessment of Water Resources in Beijing

Sustainability Assessment of Water Resources in Beijing

Towards to understanding the preliminary loss and absorption of nitrogen and phosphorus under different treatments in cotton drip- irrigation in northwest Xinjiang

Water Quality Monitoring in Inle Lake, Myanmar from the Floating Garden Activity

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