| Cite this article: | 杨媛媛,徐长春,罗映雪,等.基于植被蒸散发法的孔雀河流域天然植被生态需水估算[J].灌溉排水学报,0,():-. |
| YANG yuan-yuan,XU Chang-chun,LUO Ying-xue,et al.基于植被蒸散发法的孔雀河流域天然植被生态需水估算[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Estimation of Ecological Water Requirement for the Natural Vegetation in the Kongqi River Basin based on Vegetation Evapotranspiration |
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YANG yuan-yuan1,2,3,2, XU Chang-chun1, LUO Ying-xue1, YANG Qiu-ping1, CHEN Li1
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1.College of Resources and Environmental Sciences,Xinjiang University;2.Xinjiang,China;3.Key Laboratory of Oasis Ecology under Ministry of Education,College of Resources and Environmental Sciences
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| Abstract: |
| Abstract:【Objective】 Quantitative ecological water requirement of natural vegetation provides scientific basis and reference for rational allocation and use of limited water resources in basin.【Method】Using FAO56 Penman-Monteith formula and the drought intensity index (DSI), the spatio-temporal variation characteristics of ecological water requirement of natural vegetation in xinjiang kongquehe river basin from 2000 to 2016 were analyzed and the ecological water requirement of natural vegetation under different dry and wet conditions was calculated.【Result】(1) The average annual ecological water requirement of the natural vegetation growing season in the study area is 7.575 7×108 m3, and the water demand of natural grassland exceeds that of natural forest land.(2) From the time point of view, the total ecological water requirement in the natural vegetation growing season in the last 17 a shows a rising-falling trend as a whole and the the demarcation point occurs in 2006; As for the variation characteristics of the growing season, the ecological water requirement of the natural vegetation in the study area is mainly concentrated in June-August, accounting for 69.64 % of the total water requirement in the main growing season of the vegetation. From the space point of view, the ecological water requirement of the natural vegetation in the Kongqi River Basin is mainly concentrated in the periphery of the agricultural area in the Oasis area and on both sides of the middle and upper reaches of the river. (3) Under different dry and wet conditions , The average ecological water requirement per unit area of natural forest land and grassland shows the following rules: normal year > wet year > mild dry drought year > extreme drought year. The total amount of natural vegetation ecological water requirement shows: extreme drought years>normal years> mild drought years> wet years.【Conclusion】There are differences in the ecological water requirement of natural vegetation under different dry and wet conditions, and the change of climate factors and natural vegetation area is the main factor leading to the difference of ecological water requirement. |
| Key words: Penman-Monteith; Ecological Water Requirement; Natural vegetation; Kongqi River |
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