Characteristics of vegetation ecological water demand in Yanchi County in the arid area of Central Ningxia

Expand
  • 1 School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, Ningxia, China;
    2 Engineering Technique Research Center for Water Saving Irrigation and Water Resources in Ningxia, Yinchuan 750021, Ningxia, China;
    3 Engineering Research Center for Efficient Utilization of Water Resources in Modern Agriculture in Arid Regions, Yinchuan 750021, Ningxia, China

Received date: 2018-03-22

  Revised date: 2018-05-28

Abstract

The paper chose Yanchi County which is located in the arid area of central Ningxia Province,China,as the research object.The connotation and classification of ecological water requirement are analyzed firstly.Then the regional vegetation potential evaporation and ecological water requirement were estimated from month to month using the Penman-Monteith model.The soil moisture correction coefficient was determined using the Jensen formula combined with the measured regional soil characteristics curve at last.Through the proportion analysis of different types of ecological water requirement from vegetation,it showed that the current existing grassland ecological water requirement was far higher than that of woodland.For the three kinds of forest ecological water requirement,shrub land proportion was the largest,and the descending order list of grassland ecological water requirement from large to small was as follows:natural grassland,perennial artificial grassland,and annual artificial grassland.Secondly the temporal variation of balance law between rainfall and ecological water requirement for vegetation was analyzed,and it showed that the ecological water requirement from each kind of existing vegetation was in serious deficit except in the months of July,August and September with the situation in April being the worst.It also showed that whether there is water deficit or water surplus in terms of meeting ecological water requirement from the woodland,the shrub land was outstanding,and from the grass land,the natural grass land was outstanding.The analysis of ecological water requirement characteristics based on ecological zoning indicated that the proportion of ecological water requirement from the windy and sandy area was much greater than that in loess hilly region in the primary ecological division.For the secondary ecological division,the list in descending order based on the proportion of ecological water requirement from big to small was as follows:Huamachi town,Wanglejing town,Dashuikeng town,Gaoshawo town,Hui'anpu town,Fengjigou town and Qingshan town.The minimum value of existing rainfall consumptive ecological water requirement accounted for 30.51% of total evaporation and the suitable value accounted for 72.91% of total evaporation.The proportion was high and the rest of the evaporation part may be consumed in non-forest land soil evaporation,which belongs to ineffective evaporation of water consumption yet occupies a large proportion.

Cite this article

LI Jin-yan . Characteristics of vegetation ecological water demand in Yanchi County in the arid area of Central Ningxia[J]. Arid Land Geography, 2018 , 41(5) : 1064 -1072 . DOI: 10.12118/j.issn.1000-6060.2018.05.19

References

[1] 倪晋仁,崔树彬,李天宏,等.论河流生态环境需水[J].水利学报,2002,11(9):14-19.[NI Jinren,CUI Shubin,LI Tianhong,et al.On water demand of river ecosystem[J].Journal of Hydraulic Engineering,2002,11(9):14-19.]
[2] 沈国舫.生态环境建设与水资源的保护和利用[J].中国水土保持,2001,23(1):4-7.[SHEN Guofang.Eco-enviroment construction and water resource protection and utilization[J].Soil and Water Conservation in China,2001,23(1):4-7.]
[3] 高凯.吉林西部生态环境需水量研究[D].长春:吉林大学,2008.[GAO Kai.Study on ecological environment water demand in western region in Jilin Province[D].Changchun:Jilin University,2008.]
[4] 储蓓,尚松浩.河谷林草需水量与耗水量计算方法及其应用[C]//变化环境下的水资源响应与可持续利用——中国水利学会水资源专业委员会2009学术年会论文集,2009:479-482.[CHU Bei,SHANG Songhao.The calculation method and application of water consumption in river valley[C]//Water resources response and sustainable utilization in a changing environment:Proceedings of academic conference on water resources committee of the China Water Conservancy Association in,2009:479-482.]
[5] 何永涛,李文华,李贵才,等.黄土高原地区森林植被生态需水研究[J].环境科学,2004,25(3):35-39.[HE Yongtao,LI Wenhua,LI Guicai,et al.Study on ecological water demand for forest vegetation in Loess Plateau[J].Environmental Science,2004,25(3):35-39.]
[6] 李金燕.宁夏中南部干旱区林草植被生态需水变化研究[J].人民黄河,2016,38(12):116-122.[LI Jinyan.Variation characteristics of ecological water requirement research about forest and grass in the central and southern Ningxia[J].Yellow River,2016,38(12):116-122.]
[7] 李金燕,张维江.宁夏固原城乡饮水水源工程受水区林地生态环境需水量研究[J].湖北农业科学,2014,53(1):63-67.[LI Jinyan,ZHANG Weijiang.Eco-environmental water demand research of woodland in reception basin of urban and rural drinking water source engineering of Guyuan,Ningxia[J].Hubei Agricultural Science,2014,53(1):63-67.]
[8] 李金燕,张维江.宁夏中南部干旱区域林草植被生态需水研究[J].水土保持通报,2014,34(2):276-280.[LI Jinyan,ZHANG Weijiang.Ecological water demand research about forest and grass in the central and southern Ningxia[J].Water and Soil Conservation Bulletin,2014,34(2):276-280.]
[9] JENSEN著,马文译.耗水量与灌溉需水量[M].北京:农业出版社,1982.[JENSEN,translated by MA Wen.Water consumption and irrigation water demand[M].Beijing:Agricultural Press,1982.]
[10] 王孟本,李洪建.晋西北黄土区人工林地土壤水分动态的定量研究[J].生态学报,1995,15(2):178-184.[WANG Mengben,LI Hongjian.Quantitative study on soil moisture dynamics of artificial woodland in the yellow soil area of northwest Shanxi[J].Ecological Journal,1995,15(2):178-184.]
[11] 郭巧玲,杨云松,李建林,等.额济纳绿洲生态需水及其预测研究[J].干旱区资源与环境,2011,5(5):135-139.[GUO Qiaoling,YANG Yunsong,LI Jianlin,et al.Study on ecological water demand and prediction of Ejina oasis[J].Resources and Environment of Arid Area,2011,5(5):135-139.]
[12] 孙栋元,胡想全,金彦兆,等.疏勒河中游绿洲天然植被生态需水量估算与预测研究[J].干旱区地理,2016,39(1):154-162.[SUN Dongyuan,HU Xiangquan,JIN Yanzhao,et al.Study on the estimation and prediction of ecological water demand on natural vegetation in middle reaches of Shule River[J].Arid Land Geography,2016,39(1):154-162.]
[13] 周丹,沈彦俊,陈亚宁,等.西北干旱区荒漠植被生态需水量估算[J].生态学杂志,2015,34(3):670-680.[ZHOU Dan,SHEN Yanjun,CHEN Yaning,et al.Estimation of ecological water demand for desert vegetation in the northwest arid region[J].Journal of Ecology,2015,34(3):670-680.]
[14] 白元,徐海量,凌红波,等.塔里木河干流区天然植被的空间分布及生态需水[J].中国沙漠,2014,34(5):1410-1417.[BAI Yuan,XU Hailiang,LING Hongbo,et al.Spatial distribution and ecological water demand of natural vegetation in Tarim River trunk stream[J].Journal of Desert Research,2014,34(5):1410-1417.]
Outlines

/