Risk evaluation of available phosphorus loss in agricultural land based on remote sensing and GIS

Xiaodong Ding; Bin Zhou; Junfeng Xu; Ting Liu; Bin Xie

doi:10.1117/12.910428

15 August 2011 Risk evaluation of available phosphorus loss in agricultural land based on remote sensing and GIS

Xiaodong Ding, Bin Zhou, Junfeng Xu, Ting Liu, Bin Xie

Proceedings Volume 8203, Remote Sensing of the Environment: The 17th China Conference on Remote Sensing; 82031B (2011) https://doi.org/10.1117/12.910428
Event: Seventeenth China Symposium on Remote Sensing, 2010, Hangzhou, China

Abstract

The surplus of phosphorus leads to water eutrophication. Huge input of fertilizers in agricultural activities enriches nutrition in soil. The superfluous nutrient moves easily to riparian water by rainfall and surface runoff; leads to water eutrophication of riparian wetlands and downstream water; and consequently affects ecological balance. Thus it is significant to investigate the risk of phosphorus loss in agricultural land, to identify high concentration areas and guide the management of nutrition loss. This study was implemented mainly in the area of agricultural use in southern Western Australia, where a three-year period preliminary monitoring of water quality showed that the concentration of different forms of phosphorus in water had far exceeded the standard. Due to the large scale surface runoff caused by occasional storms in Western Australia, soil erosion was selected as the main driving factor for the loss of phosphorus. Remote sensing and ground truth data were used to reflect the seasonal changes of plants. The spatial distribution of available phosphorus was then predicted and combined with the evaluation matrix to evaluate the loss risk of phosphorus. This evaluation was based on quantitative rather than qualitative data to make better precision. It could help making decision support for monitoring water quality of rivers and riparian wetlands.

Citation Download Citation

Xiaodong Ding, Bin Zhou, Junfeng Xu, Ting Liu, and Bin Xie "Risk evaluation of available phosphorus loss in agricultural land based on remote sensing and GIS", Proc. SPIE 8203, Remote Sensing of the Environment: The 17th China Conference on Remote Sensing, 82031B (15 August 2011); https://doi.org/10.1117/12.910428

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