由渗漏导致的降水大量流失是造成喀斯特石漠化地区地表水短缺的主要原因，将渗漏的难利用蓝水转化为可供植被生长利用的生态绿水是目前技术条件下提高水资源利用量的有益探索。基于蓝水绿水理论和土壤-植物-大气连续体（SPAC）原理，通过采用EcoHAT系统水循环模型模拟贵阳市非城镇地区的蓝水绿水转化，发现：（1）研究区绿水占降水的份额不到50%，远低于全球65%的平均水平，具有很大的转化利用潜力；（2）增加植被覆盖度和增厚土层均能实现将渗漏蓝水转化为生态绿水，增厚土层的转化效果更为显著；（3）增加植被覆盖度对减少渗漏的转化作用存在一个明显的阈值，当植被覆盖度增长到56%左右时，其减少渗漏的作用急遽减弱。鉴于研究区石漠化的典型性，本研究对类似地区提高水资源利用量具有一定参考意义。

The leakage of large amount of precipitation was the main cause of surface water shortage in karst rocky desertification areas.The conversion of the leaking hard to use blue water into ecological green water for vegetation growth and utilization was a useful exploration to improve water resource utilization under current technical level.Based on the Blue Water & Green Water Theory and the Soil-Plant-Atmosphere Continuum (SPAC) Principle,the conversion of blue water into green water in non-urban areas of Guiyang city was simulated with the Water Cycle Model of EcoHAT System in this study.It was found that:(1) The green water in the study area accounted for less than 50% of the precipitation,which was far below the global average of 65%,and with great potential for conversion and utilization.(2) Increasing vegetation coverage and thickening soil layer could enhance the process converting the leakage blue water into ecological green water,and the effects of thickened soil layer was more significant than those of increasing vegetation.(3) If the vegetation coverage was increased to 56% or above,which was an threshed,the effects on leakage was then limited.The research results of this paper would provide an add value reference for improving water resources utilization in the similar rocky desertification areas.

国家自然科学基金新疆联合基金（U1603241）