��̬ϵͳ����ѧģ�Ϳ�����ʵ�ؿ̻�������Ӫ�������⡣������һģ�ͣ�����WASP ˮ��ģ�ͶԻ��֧��ϸ��2007 ����Ⱦ���������������ֵģ�⣬����ģ���Ч�����з�������͡������ʾ�� 7 �·��ڿ�����ҵ԰���;����������ӶΣ�BOD Ũ�ȣ� 140 mg·L �� 1����Ⱦ���أ�����Ҫԭ��Ϊ��ҵ��ˮ�;�����ˮ�Ĵ����ŷţ�����������̬ϵͳ����ѧģ�͵�WASP �������ľ���ع��ͳ��ģ�͸��ܷ�ӳ������Ӫ��������Ķ�̬�仯���ɡ�

Ecosystem dynamics model can truly describe the river eutrophication problem�� Based on this model�� the authors study the numerical simulation of pollutant migration of Xihe in 2007 by WASP water quanlity model�� and analyze and explain the simulation results�� The results display that the concentration of BOD is more than 140 mg·L �� 1 in July near the industrial and residential areas��the main reason is a large amount emission of industrial and residential wastewater��which shows that WASP based on ecosystem dynamics model is more able to reflect the dymatic change law of river eutrophication than traditional experience regression model��