Journal of Food, Agriculture and Environment

Estimation of non-point source pollution loads caused by soil erosion in China (II)

Author(s):

Dengxing Fan, Xinxiao Yu *, Xizhi Lv, Qingyun Li

Recieved Date: 2012-06-06, Accepted Date: 2012-10-05

Abstract:

Non-point source (NPS) pollution caused by soil erosion is the main source leading to water pollution. Therefore, it is significant to prevent soil erosion for NPS pollution control. Pollutants nitrogen (N), phosphorus (P) and Chemical Oxygen Demand (COD) were chosen as assessment indexes, and the improved method of output parameter model was adopted for statistical calculation of the pollutants loading intensity in China. NPS pollution loading intensity of spatial distribution was evaluated on the basis of Arc GIS and NPS pollution intensity grading system based on the characters and intensity of soil erosion. The results showed that among the three pollutants, COD had the highest loading intensity (25.87 kg·hm^-2) with total N (4.8 kg·hm^-2) and total P (0.36 kg·hm^-2) following. The intensity was much higher in the west China than that in the east, and was much higher in the north than that in the south. It was the interactional results of integrative influencing factors including climate, hydrology, land uses, vegetation cover and economic level. It is the first time to evaluate the main NPS pollution loading intensity of spatial distribution in national scale, which could provide some references for environmental protection and sustainable development. 

Keywords:

Intensity, spatial distribution, soil erosion, NPS pollution, China

---

Journal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 3&4
Category: Environment
Pages: 1161-1164

---

Full text for Subscribers

---

Information:

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

---

Purchase this Article:   20 Purchase PDF Order Reprints for 15

---

Share this article :