[1]ZHONG Xuzhen,WANG Lixia,YAO Kun,et al.Evaluation of Ecological Water Demand in Guanzhong-Tianshui Area Based on Functional Zoning of Ecological Environment[J].Research of Soil and Water Conservation,2020,27(06):240-246.
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Evaluation of Ecological Water Demand in Guanzhong-Tianshui Area Based on Functional Zoning of Ecological Environment
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 06
Page number:
240-246
Column:
目次
Public date:
2020-10-20
- Title:
- Evaluation of Ecological Water Demand in Guanzhong-Tianshui Area Based on Functional Zoning of Ecological Environment
- Keywords:
- functional zoning of ecological environment; CA-Markov model; vegetation-soil complex system; ecological water demand; Guanzhong-Tianshui Area
- CLC:
- X826
- DOI:
- -
- Abstract:
- In order to understand the distribution characteristics of ecological water demand in the ecological function area of the study area, to clarify the direction of regional water and soil resources utilization and the key points of ecological improvement, Guanzhong—Tianshui area was taken as the research object, the ‘RS' and ‘GIS' technology were used to complete the establishment of its ecological function division index system and functional area division. Then, evaluation ecological water requirement and spatial distribution characteristics of vegetation-soil complex system in the study area were analyzed by using vegetation ecological water demand assessment model and soil ecological water demand assessment model, the spatial distribution of land use in the study area in 2020 and 2025 was simulated and predicted by using CA-Markov model, on this basis, the ecological water demand of each ecological function area in 2020 and 2025 was measured and analyzed. The results showed that the eco-environmental functional areas in Guanzhong—Tianshui area could be divided into river protection area, drought and drought-resistant area, agricultural planting area, vegetation protection area, water conservation area, ancient city protection area; on the landscape scale, the ecological water requirement per unit area of woodland-clay loam was the largest, about 659.60 mm, the ecological water requirement per unit area of grassland-gravel loam was the lowest, about 366.34 mm, the difference between the maximum value and the lowest value was about 293.26 mm; on the scale of eco-environmental function zoning, the wider the distribution of forest land, cultivated land, and grassland in the functional area, the greater the ecological water demand, among which the smallest ecological water requirement per unit area is the ancient city protection area, and the smallest total ecological water demand is the river protection area; the largest ecological water requirement per unit area is the vegetation protection area in 2015 and 2025, the largest ecological water demand per unit area in 2020 is the water conservation area, and the largest total ecological water demand in each evaluation year is the vegetation protection area. This study shows that ecological water demand is closely related to land use patterns and ecological function zoning.
- References:
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Last Update:
2020-10-20