forest for conservation of water supply meaning in English

水源涵养林：对源头水流量具有调节作用以及对水质具有改善作用的森林群落。

It decides the protective objectives for different ecological reserve area based on the study of channel wetlands and survey and analysis of top - grade species ( fishes ) of the yellow river : from the point of the basin , the main ecological protective objectives of the tipper stream are vegetation and forest for conservation of water supply ; soil and water conservation is the main in the middle reaches for vegetation protection and rehabilitation and ; the lower reaches takes types of wetlands protection and wetlands area maintenance as the main , protecting biodiversity and important birds resources
在黄河河道湿地研究和黄河水体内顶级物种（鱼类）的调查分析基础上，确定了黄河不同类型生态保护区的生态保护目标：从流域角度而言，黄河上游的主要生态保护目标是植被和水源涵养林；中游应以水土保持为主，主要是恢复和保护植被；下游以保护湿地类型和维持湿地面积为重点，保护生物多样性和重要鸟类资源。