These problems are also existed in the NCF construction in Miyun watershed.
北京密云集水区的公益林建设，也同样面临以上问题。
参考来源 - 密云集水区公益林补偿研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Primary Study on the Response of Hydrology on Land-Use Change in Miyun Watershed.
密云水库流域土地利用变化水文响应初步研究。
The main reason of market failure of the NCF in Miyun watershed is that its external economies couldn't be realized.
密云集水区公益林市场失灵的主要原因是其正的外部性不能得到体现。
The serious soil erosion threatens ecological environment of Miyun reservoir watershed. How to control soil erosion and to improve ecological environment becomes significant.
然而严重的水土流失威胁着水库集水区生态环境，如何治理集水区内的水土流失，改善集水区生态环境非常重要。
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