Evolution law and attribution analysis of vertical distribution of blue water and green water in Taihang mountain region
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Abstract:
With Taihang mountain region (TMR, water source district of the North China Plain) as the object of research, we established the WEP-L ( Water and Energy transfer Processes in Large river basins) model to simulate the water cycle process in the TMR, and analyzed the impacts of climatic fluctuation and land-cover change on the variation of blue water and green water from 1980 to 2000. The results showed that there was a clear distinction between the distribution of blue water and green water in the Hai River basin part (HRBP) and that in the Yellow River basin part (YRBP) . In HRBP, the blue water tended to increase and the green water tended to decrease; whereas in YRBP, they showed the oppositetr end. Climatic fluctuation was the leading cause of the blue water decrease in the Taihang mountain region. The land use/ cover change was the determining fact or of green water variation. The expansion of vegetation would increase green water resources but it would significantly reduce the blue water which is crucial for economic and social development. The resource development and space optimization of the mountain region should give main consideration to the reasonable regulation of blue water and green water.
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