本地河 meaning in Chinese

autochthonous stream

Over the years , the programme has been important in helping the government assess compliance with its water quality objectives , and evaluate how effective its various water quality control measures have been
多年来水质监测计划公正地评估了本地河溪水质指标达标情况及各项水质改善措施的成效，它亦是规划未来污染管制和消减措施的重要工具。
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。