Scenario based optimization and simulation of land use in flood detention basins: A case study of Mengwa
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Abstract:
The temporal and spatial distributions of land use/land cover change situations in Mengwa,Huaihe River from 2000 to 2014 were investigated based on land use dynamic index and transition matrix.Three scenarios (24 sub-scenarios),"Immigration" "Agriculture land reduction" and "Combined actions",were developed and simulated by CLUE-S model to predict future land use pattern under different policies and restrictions.The optimization and simulation results indicated that land use pattern in flood detention basins were greatly influenced by engineering works and policies.Among four kinds of land use patterns as forest,pond,agricultural land and residential areas,spatial distribution competition existed:the priority of forest was higher than pond,in the periphery of residential areas of upper and middle reaches,while pond was the highest in the surrounding areas of lower embankment and rivers,.The predicted and optimized land use patterns would have advantages in flood reduction,water resources conservation and ecological functions.
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