n.集水，贮水；流域，排水区；贮水池，承水处
It has a total catchment area of 17 square kilometres. 屯门河集水区的总面积为17平方公里。
Abstract: The effect of erosion control by agroforestry is an essential factor of little catchment planning. 摘要：农林复合系统的侵蚀控制效益是在小流域整治规划中必须考虑的重要因素。
