密云水库主要水源保护林的水源涵养能力比较

Comparation on the water conservation capacity of water resources protection forests in Miyun reservoir watershed

密云水库集水区水源保护林建设是一项具有战略意义的重点工程,对保护集水区的蓄水能力、改善水质、防治水土流失以及对北京未来饮用水供给都有十分重要的意义。针对水库现有水源保护林主要树种组成和林分类型现状,对截留降雨、枯枝落叶容纳降雨、林地土壤蓄水、减少地表径流和净化水质等方面进行分析、比较和评价。最后建议库区水源保护林营造应加大利于节水和净水的树种比例,提出多树种、多林种的都市水源保护林发展思路。

Construction of water protection forest in Miyun reservoir watershed of Beijing is a key project. The protection of the watershed area of water storage capacity, improve water quality, prevent soil erosion and drinking water supply in future are great significance. The forest types and present condition, the effect of deadwood leaves on the absorption of rain, woodland soil water storage capacity and overland flows and the purification of water as it moves are considered. Suggestions on the forest with greatest water conservation capacity should be constructed, in line with ability to improve water quality. The development ideas of multi tree species and multi forest species in urban water resources protection forest are put forword.