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JOURNAL OF NATURAL RESOURCES >

2013 , Vol. 28 >Issue 10: 1743 - 1753

DOI: https://doi.org/10.11849/zrzyxb.2013.10.009

Resources Evaluation

Vegetation’s Ecological Water Requirement in Yongding River Watershed in Shanxi Province

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  • 1. Institute of Resource and Environment, Shanxi Agricultural University, Taigu 030801, China;
    2. Shanxi Centre of Soil and Water Conservation and Ecological Environment Construction, Taiyuan 030002, China;
    3. Department of Water Resourcces of Shanxi Province, Taiyuan 030002, China

Received date: 2012-09-04

  Revised date: 2013-05-04

  Online published: 2013-10-20

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Abstract

The Yongding River is one of the seven major river systems in Haihe Watershed and an important branch of the Guanting Reservoir. Since the 1980s, along with the increase of population, economic development and city size's expansion in the upper reaches, increasing water consumption of production and living occupied eco-water requirement greatly. This lead to soil erosion and vegetation degradation in the upper reaches, but also accelerated the Guanting Reservoir sedimentation. For further understanding water usage and hydrologic process in this region so that the vegetation eco-water requirement could be met as far as possible and eco-environmental construction in this area be promoted, this paper performed a study on vegetation eco-water requirement in the Yongding River watershed of Shanxi Province, which is located in the upper reaches of the Yongding River. Based on the data from 17 meteorological stations in the Yongding River watershed of Shanxi Province and neighboring area from 1957 to 2000, vegetation's eco-water requirement in the watershed was estimated by applying agricultural theory and using GIS. In addition, its change characteristics of different vegetation types, different administrative districts and growth periods were analyzed as well. Also, eco-water surplus/scarity was analyzed by applying water balance theory and combining eco-water requirement and rainfall. The results showed that: 1)The minimum eco-water requirement in the study area is 1628.5×106 m3, the corresponding surplus is 653.5×106 m3, the suitable eco-water requirement is 2709.5×106 m3 and the corresponding scarcity is 427.5×106 m3. 2) There is no eco-water scarcity for grass, shrub and forest compared with the minimum eco-water requirement; there is eco-water scarcity for forest and shrub in some area compared with suitable eco-water requirement. 3) The areas with relatively serious eco-water scarce problem are mainly located in Datong, Pinglu, Huairen, concentrating in April to June.

Key words： forest and grass vegetation; GIS; eco-water requirement; Yongdinghe watershed of Shanxi Province

Cite this article

WANG Gai-ling, WANG Qing-chu, SHI Sheng-xin . Vegetation’s Ecological Water Requirement in Yongding River Watershed in Shanxi Province[J]. JOURNAL OF NATURAL RESOURCES, 2013 , 28(10) : 1743 -1753 . DOI: 10.11849/zrzyxb.2013.10.009

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