| Preliminary study on delimitation of ecological protection red line in Hotan River Basin |
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| DOI：10.7606/j.issn.1000-7601.2017.06.34 |
| Key Words: ecological protection red line Hotan River Basin ecological water requirements ecological basic flow groundwater protection |
| Author Name | Affiliation | | GUO Hong-wei | State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, CAS, Urumqi, Xinjiang 830011, China
University of Chinese Academy of Sciences, Beijing 100049, China | | XU Hai-liang | State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, CAS, Urumqi, Xinjiang 830011, China | | LING Hong-bo | State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, CAS, Urumqi, Xinjiang 830011, China | | YAN Jun-jie | State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, CAS, Urumqi, Xinjiang 830011, China
University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: |
| The delimitation of ecological protection red line is possessed important significance to guarantee the sustainable development of continental river basin in arid zone. Therefore, the objective of this paper was to discuss the suitable delimitation scheme of ecological protection red lines, and choose the Hotan River Basin as study area. Based on analysis of the distribution characteristics of the natural vegetation, the two different grade of ecological protection red line zones were divided, meanwhile the natural vegetation ecological water demand red line, ecological flow protection red line and groundwater protection red line were calculated and delimited by the phreatic evaporation method and base flow proportion method. The results showed that: (1) The natural vegetation in the Hotan River Basin was divided into the key ecological function area and ecological sensitive or fragile area. (2) The key ecological function area and ecological sensitive or fragile area in the lower reaches were major distributed 5～8 km and 8～15 km from the river course, respectively. (3) The natural vegetation ecological water demand red line was 8.85×108 m3. (4) In the wet year, normal year and dry year, the ecological flow protection red lines were 13.79×108 m3, 12.14×108 m3 and 10.68×108 m3 respectively. (5) The groundwater table red line for natural and artificial oasis were 2.0～4.0 m and 2.0～2.5 m respectively, the groundwater exploitation red line was 6.07×108 m3. This research not only provides scientific guidance for the coordinated development of “society-economy-ecology” in the Hotan River Basin, but also offers reference for the delimitation of ecological protection red lines in similar basin of arid area. |
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