黄河下游“断流”河段水量与水质的关系

THE RELATIONSHIP BETWEEN WATER QUALITY AND WATER QUANTITY IN THE LOWER YELLOW RIVER

根据全球水质监测计划 (GEMS/WATERProgram)资料和我国黄河水利委员会的水文 ( 1 95 0— 2 0 0 0 )和水质监测数据 ( 1 96 0— 2 0 0 0 ) ,研究了黄河下游“断流”河段水质与水量的关系 .结果表明 :90年代后期 ,在黄河下游流量急剧减少和“断流”情况下 ,河水中主要离子的含量急剧增加 .另外 ,黄河下游“断流”河段水质参数随流量的变化有三种情况 :易溶解化合物水质指标的含量随流量增加而降低 (如EC ,Cl- ,SO2 - 4等 ) ;难溶化合物水质指标的含量随流量增加而增加 (悬浮物、总磷和粪大肠杆菌等 ) ;其他水质指标含量的变化与径流量变化的关系不明显 .对部分水质指标与径流量关系进行拟合研究 ,预测值与实测值吻合很好 .

Relations between water quantity and water quality in the lower Yellow river were studied using the data from 1960 to 2000.Results indicate that there exist notable negative relationships between contents of major ions and discharges.There are three types for relations of water quality changes with water quantity:dissolved components,such as EC,Cl -,SO 2- 4,decrease as discharge and runoff increase;non-dissolved components,such as suspended solids,total phosphor,fecal coli-form,increase as discharge and runoff increase;and other water quality parameters dont have a notable relation with water quantity.The regression models for relations between water quantity and water quality were studied,and the measured values coincide well with simulated values.