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1��(Introduction)
��ˮ��ָ��ˮ̎��S��̎��ˮ��,��(j��)�y(t��ng)Ӌ(j��),�Ї�(gu��)ÿ��a(ch��n)��s��420 �f(w��n)t,�ۺϺ�ˮ80%��Óˮ��s��2100 �f(w��n)t(�w�c��, 2002). ��ˮ��һ�㶼��д��Ĳ�ԭ��x,��²�΢��Ｐ�y�ֽ��ЙC(j��)��,�@Щ��粻��(j��ng)�^̎��,��ѷŻ��ų�,��(hu��)��Ⱦˮ�w,��ʹ��,��B(t��i)�Ɖ�. ��̎��ʩһ��֞��r(n��ng)�ʡ��,��ٟ��͟��ȷ��(��,2011),��,�ٟ��Мp�ݻ�,��o��ٻ�,��,��Դ��Եȃ�(y��u)�c(di��n)��õ��^��̶ȵđ�(y��ng)��,��

ᘌ�(du��)��ٟ�̎��,��(gu��)��(n��i)��ܶ��W(xu��)�߲��ß��ط��(du��)��ͬ��Դ,��ͬ��ϱ��༰��c��|(zh��)��ȼ��О��M(j��n)��о�( ��,2006; Xiaoet al. , 2009; Sang et al. , 2011;��,2011),��˽��ȼ��C(j��)��,��ö�N�u(p��ng)�r(ji��)��(sh��)��(du��)��ȼ��M(j��n)��˾C��u(p��ng)�r(ji��)(��ԣ��,2007;Ƚ��ϵ�,2008). Font ��(2001)ָ��,��в�ͬ��|(zh��)��ȼ���^��. �ؿ��(2004)��ğ��ط��l(f��),�ó��3 ��(g��)��(d��)��ġ��B�m(x��)��ƽ�з��(y��ng)�M�ɵĄ�(d��ng)��W(xu��)ģ��. �f(w��n)��褵�(2010)ͨ�^��ط��о��ڲ�ͬ��w�e��µ�ȼ��(d��ng)��W(xu��)��. ��۵�(2005)�о��l(f��)�F(xi��n),��ͬ��ٴ߻��(du��)��ȼ��ȼ�M��һ��Ĵ߻��. ��µ�(2009a)�о��˲�ͬ��ٻ��(du��)��I(y��)��ȼ��. Ŀǰ,�о��ȼ��C(j��)��Գ��õķ��ǌ��ֽ��ȼ��ֱ�Ӽٶ��麆(ji��n)�η��(y��ng),��һ��(j��)��(y��ng),ͨ�^�A(y��)��O(sh��)��(y��ng)�C(j��)��ģ��M(j��n)�Д�(sh��)ֵ�M��,��ߌ�(du��)�ߵ͜طքe�M(j��n)�ДM��,�� (sh��)��,��ˮ��ğ��,��ȼ��^��,�ҷ֡��]�l(f��)�ֵĳɷֶ��^��(f��)�s. �]�l(f��)�ֵ��,��ĔU(ku��)ɢ��W(xu��)��(y��ng)��S�ضȵ�׃��,��ȼ��^�̲��Ą�(d��ng)��^(q��)��U(ku��)ɢ�^(q��)�M(j��n)��D(zhu��n)�Q;��,��(n��i)��U(ku��)ɢ�c�a(ch��n)��w��U(ku��)ɢ��໥��K,��,��(ji��n)�εļ��O(sh��)��w�˷��(y��ng)�^�̵ď�(f��)�s�Ժ͙C(j��)��. ��,ͨ�^��(du��)�҇�(gu��)111 ��(g��)��й�193 ��(g��)��ˮ̎��S��ɷֵ��½y(t��ng)Ӌ(j��)��(�R�W(xu��)�ĵ�,2011),2003—2008 ��5 ��g,��к��е��ؽ��ټ��ЙC(j��)�|(zh��)��l(f��)��׃��,�ʬF(xi��n)�Ϸ��е��ؽ��(Zn,��Cu,��Cd��Cr,��Ni),��N��P ��ڱ��c(di��n), ��A(y��)Ӌ(j��)��2020��,�V��ĳǅ^(q��)��ˮ��_(d��)4. 30 ×106 m·3 d-1(��O��,2007). ��a(ch��n)��ˮ��0. 3% ~0. 5%Ӌ(j��)��,�Õr(sh��)��a(ch��n)��_(d��)1. 29 ×104 ~2. 15 ×104 t·d-1 (�Ժ�ˮ��98% Ӌ(j��)),��,��Ҫ��(du��)�V�ݮ�(d��ng)ǰ��ȼ��M(j��n)��ȫ��u(p��ng)�r(ji��)��ȼ��ģ��,��

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