Water yield calculation and mapping are of great importance to water resource planning and management and hydropower station construction. A water yield model based on InVEST was employed to estimate water runoff in t...Water yield calculation and mapping are of great importance to water resource planning and management and hydropower station construction. A water yield model based on InVEST was employed to estimate water runoff in the Xitiaoxi River basin. The data included land use and land cover, average annual precipitation and potential evapotranspiration, soil depth, and plant available water content. In order to test model accuracy the natural runoff of Xitiaoxi River was estimated based on linear regression relation of rainfall-runoff in a ‘reference period’. After repeated validation, when the Z value was 6.5 the water yield was 8.30 E＋8 m3 and this was a smaller difference with natural runoff. From the distribution of water yield, south and southwestern areas of the watershed had higher water yield volumes per hectare.展开更多
[目的]研究大连市产水量的时空分布特征和影响因子,为该市水资源的开发与保护提供可视化的评估结果和依据。[方法]基于InVEST模型的产水量模块,探究1980—2015年大连市降雨、气温、潜在蒸散、实际蒸散及土地利用状况变化特征,定量研究1...[目的]研究大连市产水量的时空分布特征和影响因子,为该市水资源的开发与保护提供可视化的评估结果和依据。[方法]基于InVEST模型的产水量模块,探究1980—2015年大连市降雨、气温、潜在蒸散、实际蒸散及土地利用状况变化特征,定量研究1980—2015年大连市产水量的时空分布特征及其成因。[结果]①1980—2015年期间大连市年均降水和潜在蒸散发不显著下降,年均气温和干燥系数显著增加,年均实际蒸散量显著下降。②研究期间大连市耕地、林地面积有所减少。城市建设用地面积有所增加,主要由耕地转移而来。其他用地类型面积变化较小。③研究区平均产水量为226.36 mm,产水总量2.70×10 9 m 3。空间上由东北向西南递减。庄河市年均产水总量最大,达到1.10×10 9 m 3。[结论]研究区产水量的变化是气候变化和土地利用共同作用的结果。气候变化是影响产水量变化的主要驱动力,土地利用变化对产水量的增加有轻微影响。展开更多
基金National Major Water Pollution Control Project(No.2008ZX07526-007)
文摘Water yield calculation and mapping are of great importance to water resource planning and management and hydropower station construction. A water yield model based on InVEST was employed to estimate water runoff in the Xitiaoxi River basin. The data included land use and land cover, average annual precipitation and potential evapotranspiration, soil depth, and plant available water content. In order to test model accuracy the natural runoff of Xitiaoxi River was estimated based on linear regression relation of rainfall-runoff in a ‘reference period’. After repeated validation, when the Z value was 6.5 the water yield was 8.30 E＋8 m3 and this was a smaller difference with natural runoff. From the distribution of water yield, south and southwestern areas of the watershed had higher water yield volumes per hectare.
文摘[目的]研究大连市产水量的时空分布特征和影响因子,为该市水资源的开发与保护提供可视化的评估结果和依据。[方法]基于InVEST模型的产水量模块,探究1980—2015年大连市降雨、气温、潜在蒸散、实际蒸散及土地利用状况变化特征,定量研究1980—2015年大连市产水量的时空分布特征及其成因。[结果]①1980—2015年期间大连市年均降水和潜在蒸散发不显著下降,年均气温和干燥系数显著增加,年均实际蒸散量显著下降。②研究期间大连市耕地、林地面积有所减少。城市建设用地面积有所增加,主要由耕地转移而来。其他用地类型面积变化较小。③研究区平均产水量为226.36 mm,产水总量2.70×10 9 m 3。空间上由东北向西南递减。庄河市年均产水总量最大,达到1.10×10 9 m 3。[结论]研究区产水量的变化是气候变化和土地利用共同作用的结果。气候变化是影响产水量变化的主要驱动力,土地利用变化对产水量的增加有轻微影响。
