Regulation framework of watershed landscape pattern for non-point source pollution control based on ‘source-sink’ theory: A case study in the watershed of Maluan Bay, Xiamen City, China

doi:10.13287/j.1001-9332.201610.013

Abstract

Abstract: Watershed landscape pattern regulation and optimization based on ‘source-sink’ theory for non-point source pollution control is a cost-effective measure and still in the exploratory stage. Taking whole watershed as the research object, on the basis of landscape ecology, related theories and existing research results, a regulation framework of watershed landscape pattern for non-point source pollution control was developed at two levels based on ‘source-sink’ theory in this study: 1) at watershed level: reasonable basic combination and spatial pattern of ‘source-sink’ landscape was analyzed, and then holistic regulation and optimization method of landscape pattern was constructed; 2) at landscape patch level: key ‘source’ landscape was taken as the focus of regulation and optimization. Firstly, four identification criteria of key ‘source’ landscape including landscape pollutant loading per unit area, landscape slope, long and narrow transfer ‘source’ landscape, pollutant loading per unit length of ‘source’ landscape along the riverbank were developed. Secondly, nine types of regulation and optimization methods for different key ‘source’ landscape in rural and urban areas were established, according to three regulation and optimization rules including ‘sink’ landscape inlay, banding ‘sink’ landscape supplement, pollutants capacity of original ‘sink’ landscape enhancement. Finally, the regulation framework was applied for the watershed of Maluan Bay in Xiamen City. Holistic regulation and optimization mode of watershed landscape pattern of Maluan Bay and key ‘source’ landscape regulation and optimization measures for the three zones were made, based on GIS technology, remote sensing images and DEM model.

HUANG Ning, WANG Hong-ying, LIN Tao, LIU Qi-ming, HUANG Yun-feng, LI Jian-xiong. Regulation framework of watershed landscape pattern for non-point source pollution control based on ‘source-sink’ theory: A case study in the watershed of Maluan Bay, Xiamen City, China[J]. Chinese Journal of Applied Ecology, 2016, 27(10): 3325-3334.

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