Non-point source pollution and control countermeasures in rural areas of Hebei province, China

Forestland is a key land use/land cover (LULC) type that affects nonpoint source (NPS) pollution, and has great impacts on the spatiotemporal features of watershed NPS pollution. In this study, the forestland characteristics of the Chaohu Basin, China, were quantitatively represented using forestland types (FLTs), watershed forest coverage (WFC) and forest distance from the river (DFR). To clarify the impact of forests on NPS pollution, the relationship between forestland characteristics and watershed nutrient outputs (TN and TP) was explored on a monthly scale using SWAT (Soil and Water Assessment Tool) and the period simulation was 2008–2016. The results showed that: (1) the TN and TP showed similar output characteristics and the rainy season was the peak period of nitrogen and phosphorus output. (2) Among the forestland characteristics of forestland types, watershed forest coverage and forest distance from the river, watershed forest coverage and forest distance from the river had greater effects than forestland types on the control of watershed nutrient outputs (TN and TP). (3) In different forestland types, the watershed nutrient outputs intensity remained at the lowest level when the FLTs was mixed forest, with a TN output of 1244.73kg/km2 and TP output of 341.39 kg/km2. (4) The watershed nutrient outputs and watershed forest coverage were negatively correlated, with the highest watershed forest coverage (over 75%) reducing the TN outputs by 56.69% and the TP outputs by 53.46% compared to the lowest watershed forest coverage (below 25%), it showed that in areas with high forest land coverage, the non-point source pollution load in the watershed is smaller than in other areas. (5) forest distance from the river had an uncertain effect on the TN and TP output of the basin, the forestland itself is a source of pollution, but it also has the function of intercepting pollution movement; the forest distance from the river in the range of 500–1000 m had the lowest NPS pollution. Considering the different forest characteristics and topographical factors, an optimal allocation mode of differentiated forest land was proposed, these suggestions will provide a scheme for surface source pollution prevention and control in the basin. This research gap is the basis of real forestland optimization. We may optimize the forestland layout for NPS pollution prevention and control by clarifying the internal mechanism.

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Study on the Effect of Rice-Frog System on Controlling Agricultural Non-Point Source Pollution

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.468-471.2637 ◽

2012 ◽

Vol 468-471 ◽

pp. 2637-2640

Author(s):

Mu Qing Qiu ◽

Xiao Bo Yao ◽

Li Yang

Keyword(s):

Point Source ◽

Agricultural Production ◽

Pollution Prevention ◽

Rice Paddy ◽

Point Source Pollution ◽

Symbiotic System ◽

Wide Range ◽

The Status ◽

And Control ◽

Non Point Source Pollution

China's agricultural production in the course of a wide range of point source pollution, large and difficult to control. Symbiotic system rice-frog as a good traditional agricultural production, with outstanding ecological, economic and other values, has been identified as globally important agricultural heritage and the first to be protected. Summary of agricultural non-point source pollution in the status quo to explain the symbiotic system rice-frog to reduce agricultural nonpoint source pollution in the role, made on the basis of frog in rice paddy planting to optimize the structure, development of ecological agriculture is the agricultural non-point source pollution prevention and control an effective way.

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Analysis and Improvement of Livestock Wastes Collection System in Rural Areas — A Case Study of Erhai Lake Watershed

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.518-523.3275 ◽

2012 ◽

Vol 518-523 ◽

pp. 3275-3281

Author(s):

Guang Fei Qu ◽

Yu Huan Liu ◽

Ping Ning ◽

Xiang Feng Xiong

Keyword(s):

Point Source ◽

Rural Areas ◽

Erhai Lake ◽

Collection System ◽

Point Source Pollution ◽

The Status ◽

Treatment Facilities ◽

Non Point Source Pollution

Housing feeding is scattering in most part of China. The dislocation between the date of getting livestock wastes out and the fertilization date and also a shortage of supervision have been making a serious loss of livestock wastes and be a reason of agricultural non-point source pollution. The collection mode which befits the northern valley of Erhai Lake is proposed by considering the characteristics of rural non-point source pollution and the status of wastes collection and treatment facilities. The conclusion that the decentralized collection should be taken the place of centralized collection is also come to at last.

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