Yang Jie, Xie Bao-Peng, Zhang De-Gang
College of Pratacultural Science/Ministry of Education Key Laboratory of Grassland Ecosystem, Gansu Agricultural University, Lanzhou 730070, China.
College of Management, Gansu Agricultural University, Lanzhou 730070, China.
Ying Yong Sheng Tai Xue Bao. 2020 Aug;31(8):2731-2739. doi: 10.13287/j.1001-9332.202008.015.
Yellow River Basin is an important water conservation and ecological barrier area, the study of water supply service in which is of great significance to the high-quality development and ecological environment protection. Based on the Invest InVEST model and the method of scenario analysis, we analyzed the temporal and spatial patterns of water yield in the Yellow River Basin in recent 20 years (1995-2015) with land use and cover, meteorological and soil data as inputs. We examined the impacts of precipitation change and land use change on water yield and their impacts on water yield. The results showed that water yield depth had average growth of 24.34 mm from 1995 to 2015. The high water yield area located in the west and southwest, and the low water yield area located in the northwest. The change of deep spatial pattern was not evident. Among the three grade basins in the Yellow River Basin, the river basin above Longyangxia, with the highest water yield of about 11.7 billion m·a, was the main water yield area of the Yellow River Basin. The river basin from Lanzhou to Hekou had the lowest water yield, with a value of 44 million m·a. The average water yield depth of permanent glacier and snow land was the largest in the whole basin. Grassland was the main contributor to the total water yield of the whole basin, providing 62.6% of the total water yield. Land use/cover change had moderate effect on water yield.
黄河流域是重要的水源涵养和生态屏障区，研究其供水服务对高质量发展和生态环境保护具有重要意义。基于InVEST模型和情景分析方法，以土地利用与覆盖、气象和土壤数据为输入，分析了近20年（1995—2015年）黄河流域产水量的时空格局。考察了降水变化和土地利用变化对产水量的影响及其作用。结果表明，1995—2015年产水深度平均增长24.34毫米。高产水区位于西部和西南部，低产水区位于西北部。深度空间格局变化不明显。在黄河流域的三级流域中，龙羊峡以上流域产水量最高，约为117亿立方米/年，是黄河流域的主要产水区。兰州至河口区间流域产水量最低，为4400万立方米/年。全流域永久冰川和积雪区的平均产水深度最大。草地是全流域总产水量的主要贡献者，提供了62.6%的总产水量。土地利用/覆盖变化对产水量有中等程度的影响。
