干旱区研究

Arid Zone Research >

2014 , Vol. 31 >Issue 5: 785 - 791

DOI: https://doi.org/10.13866/j.azr.2014.05.01

Land and Water Resources

Strategy of Ecological Water Conveyance to the Lower Reaches of Tarim River, Xinjiang, China

  • YANG Peng-nian ,
  • WU Wen-qiang ,
  • MAIHEMUTI Balati ,
  • WEI Guang-hui
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  • 1. College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China;
    2. China Institute of Water Resources and Hydropower Research, Beijing 100038, China;
    3. Department of Mainstream, Tarim River Basin Authority, Korla 84100, Xinjiang, China

Received date: 2013-12-24

  Revised date: 2014-03-20

  Online published: 2014-09-25

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Abstract

Ecological degeneration in the Green Corridor in lower reaches of the Tarim River was mainly caused by the 30-year last stream cutoff downstream from the Daxihaizi Reservoir in lower reaches of the Tarim River from 1972. From May 2000 to 2011, 12 times ecological water conveyance were implemented so as to rise the groundwater level and improve the ecology in the lower reaches. The observed data up to October 2011 showed that the groundwater level along the Yengisu, Aragan, Korgan and old Yengisu sections of was risen up to a certain degree compared with that before implementing the project. Groundwater level near the river was risen by 3.5 m, 6.0 m, 5.0 m and 3.0 m along these sections above respectively, but by 2.0 m, 3.0 m, 4.0 m and 1.0 m at the places 1 km away from the river. Namely, the rising extent of groundwater level was closely related to the distance away from the river. As a result, the groundwater level was obviously risen up. When the groundwater depth was risen to 4.0 m, 3.5 m and 3.0 m respectively, the vegetation survival conditions were accordingly called the “survival maintaining conditions”, “basic survival conditions” and “suitable survival conditions”. On which it was calculated that the water consumptions of vegetation within a wide extent 1 km away from the river were 1.6×108 m3, 2.2×108 m3 and 2.7×108 m3 respectively. Water release from the Daxihaizi Reservoir could be scheduled in spring, summer and winter for germination of plant seeds and regeneration of Populus euphratica. The annual water release of 2.7×108 m3 should be maintained in recent years so as to improve the groundwater environment in the lower reaches and to meet water consumption of vegetation at the suitable survival level.

Key words： ecological water conveyance; scheme; water consumption of vegetation; groundwater level; vegetation survival statuses; lower reaches of the Tarim River

Cite this article

YANG Peng-nian , WU Wen-qiang , MAIHEMUTI Balati , WEI Guang-hui . Strategy of Ecological Water Conveyance to the Lower Reaches of Tarim River, Xinjiang, China[J]. Arid Zone Research, 2014 , 31(5) : 785 -791 . DOI: 10.13866/j.azr.2014.05.01

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