CUI Wei, Baiyinbaoligao, CHEN Wen-xue, CHEN Xing-ru

State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China

Abstract: For dealing with problems such as the large number of rivers, lack of basic data, difficulties in setting the priorities when managing nonpoint source pollution for small and medium-sized river basins, a set of methods are put forward based on RS and GIS techniques. The methods can estimate the pollution load, identify the principal pollutant and primary pollution source, and determine the prior control area & river promptly and effectively. Taking the Harbin city as example, the non-point source total nitrogen (TN) and total phosphorus (TP) pollution sources are firstly analyzed. Then pollutant load distribution is estimated using export coefficient model (ECM) referring to the data of statistical yearbook, water resources bulletin and land use data in 2010. The non-point source TN & TP load proportion together with primary pollution source are identified using the equal-standard-pollution-load method. Based on this work, the Harbin region is divided into 5 subregions according to equal-standard-pollution-load. 58 small and medium-sized river regions are classified into 5 classes using cluster analysis method. Therefore the prior area and river basin are determined.

Key words: non-point source, small and midsize river basins, export coefficient model, equal-standard-pollution-load, cluster analysis, delineation

Published in: Journal of China Institute of Water Resources and Hydropower Research (Vol. 11 No. 1, 2013)