Salt-water Balance and Dry Drainage Desalting in Hetao Irrigating Area, Inner Mongolia

  • 1. Research Institute of Forestry, Chinese Academy of Forestry/Key Laboratory of Tree Breeding & Cultivation, State Forestry Administration, Beijing 100091;
    2. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000;
    3. Information Center of Flood Control & Drought Relief of Inner Mongolia, Hohhot, Inner Mongolia 010020

Received date: 2005-02-28

  Revised date: 2005-07-02

  Online published: 2006-07-20


Hetao irrigating area of Inner Mongolia is a major irrigated area in the upper reaches of the Huanghe(Yellow) River. Affected by arid climate and special hydrogeology, with unfavorable drainage networks, underground water table rises to and above critical depth, which leads to salinity and waterlogging. It is necessary for Hetao irrigating area to undergone the water-saving and modification project for salinity and waterlogging controlling. In the Hetao irrigating area by quantitatively assessing the input and output of water and salinity, it has been calculated that saline accumulation reaches 1.6826?106t annually. The desert or fallow areas in the Hetao irrigating area have the function of salts accumulation with the aid of evaporation to prevent the cultivated land from salinity, and these salts accumulation accounts for 65% of the salts that are introduced to irrigated land with the irrigation water from the Huanghe River, which are also much more than the amount of salts drainage to the Wuliangshu Lake. The dry drainage technique should be developed for the controlling of salinity and waterlogging in Hetao irrigating area. It has also been shown that adjusting planting structure to growing salt-tolerant native and introducing species for grazing and forage use could improve profitability of more saline soils, promote fertile procession, restrain the effect of salt in the arable land.

Cite this article

WANG Xue-Quan, GAO Qian-Zhao, LU Qi, LI Bin . Salt-water Balance and Dry Drainage Desalting in Hetao Irrigating Area, Inner Mongolia[J]. SCIENTIA GEOGRAPHICA SINICA, 2006 , 26(4) : 455 -460 . DOI: 10.13249/j.cnki.sgs.2006.04.455


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