不同土地利用/覆盖类型下海南岛产水量空间分布模拟

Simulation of spatial distribution of water yield of Hainan Island with different types of land use/land cover

设定3种不同的情境,应用InVEST模型,利用水量平衡原理模拟土地利用/覆盖类型变化下海南岛产水量的空间分布。结果表明:海南岛年均产水深可达979.04 mm;其中中部地区产水量最高,西部地区产水量最低;当林地面积逐渐减少、城市建成区面积增长1倍时,产水量的增加量最大,年均产水深可达1004.06 mm;当耕地面积逐渐减少、城市和建成区面积增长1倍时,年均产水深则为1002.22 mm。

In this study , the InVEST model was used to simulate the spatial distribution of water yield of Hainan Island under conditions of changing land use/land cover types in three scenarios according to the principle of water balance .The results show that the annual average water yield depth of Hainan Island was 979.04 mm.The central area of the island had the highest water yield and the western area had the lowest water yield .When the forest area was gradually reduced and the urban built-up area was doubled , the water yield increased most significantly , with an annual average water yield depth of 1 004.06 mm.When the cultivated area was gradually reduced and the urban built-up area was doubled , the annual average water yield depth reached 1 002.22 mm.