Yanhe spring karst water system is one of the famous springs in North China.
山西省延河泉岩溶水系统是我国北方岩溶大泉之一。
Yanhe River watershed, and show nearly East-West from the integration of areas in the central passage.
南河与秀延河分水岭近东西向从整合区中部通过。
From the space distribution, potential vegetation biomass is higher than the reality of vegetation in the southeast of Yanhe River catchment, vegetation have better growth potential;
从空间分布上，流域东南部的大部分地区，植被潜在生物量高于现实生物量，植被有较好的生长潜力；
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