2000—2020年汾河流域生态环境与水源涵养时空变化

doi:10.13866/j.azr.2023.02.15

Abstract

Abstract:

The ecological environment quality (based on the principles of space-time, ecology, integrity, and the dynamic changes) and water conservation in Fenhe River Basin in the past 20 years were analyzed by using the RSEI model and the InVEST model. The relationship between RSEI and water conservation was studied through the correlation analysis. The results showed that: (1) from 2000 to 2020, the area of a good grade RSEI increased by 23.6%, and the area of excellent grade (mainly distributed in the West and East of Fenhe River Basin) increased by 1.9% (2) In 2020, the total amount of water conservation would be 228.9 × 10⁸ mm (an increase of 23 × 10⁸ mm compared with 2000). High conservation capacity was mostly found in the upstream water supply, while the intermediate region of the middle and lower reaches had poor water conservation ability (3) The positive correlation between RSEI and water conservation was 78.42%. Conclusions: (1) The ecological environment of the Fenhe River Basin has been improving continuously for the past 20 years. The medium level shown a declining tendency after fluctuation, whereas the good and poor areas had both increased annually. (2) Over the past 20 years, the water conservation function of the Fenhe River Basin had been continuously improved. The water conservation capacity of the upstream water source areas had increased significantly, while the intermediate and lower reaches had less water conservation capacity. (3) The proportion of positive correlation between the ecological environment and water conservation in the Fenhe River Basin was the largest. The improvement of water conservation capacity could promote the improvement of ecological environment quality and vice versa. There are 21.58% of the regions with negative correlation, which was mainly related to the dominant factors of the two.

Key words: ecological environment, water conservation, spatial and temporal changes, Fenhe River Basin

XU Liting,LIU Haihong,HUANG Lijie,WANG Yufan. Spatial and temporal changes of ecological environment and water conservation in Fenhe River Basin from 2000 to 2020[J].Arid Zone Research, 2023, 40(2): 313-325.

Figures/Tables 11

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数据类型	空间分辨率/m	数据来源	数据处理
汾河流域	90	中国科学院资源环境科学与数据中心	DEM水文分析，确定流量和流向，划分分水岭，生成流域矢量边界
遥感影像	50	全球云计算平台Landsat影像（TM影像和OLI影像）	中值合成、影像筛选、几何纠正、辐射定标、大气校正、拼接裁剪
土地利用类型	30	生态遥感前沿	5期数据均进行Albers投影转换、流域矢量数据裁剪等预处理
降水量	1000	国家地球系统科学数据中心	5期数据均进行Albers投影转换、流域矢量数据裁剪等预处理
潜在蒸散发	1000	Applied Spatial Econometrics	5期数据均进行Albers投影转换、流域矢量数据裁剪等预处理
土壤	1000	国家青藏高原科学数据中心	5期数据均进行Albers投影转换、流域矢量数据裁剪等预处理

Spatial and temporal changes of ecological environment and water conservation in Fenhe River Basin from 2000 to 2020

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