assimilative capacity meaning in Chinese

视同能力
同化能力

The pollution problems of the rivers and streams in that region have accordingly improved considerably in the past decade . however , as the base flow of local rivers and streams is generally small , their assimilative capacity is therefore low . this , coupled with the continued development and hence population growth in the river catchments , as well as the lack of maintenance of many private septic tank systems , has caused the water quality of some rivers and streams in the northwest new territories to remain unsatisfactory
而溪流的污染情况在过去的十年间亦因此而有所改善，但由于本地河溪的流速相当慢，河流的自净能力相对偏低，而河溪的周边不断发展，人口持续增加，加上部分私人的化粪池系统欠缺打理，未能有效运作，所以新界西北仍有部份河溪水质未如理想。