干旱区生态环境知识资源中心(Arid): 干旱内陆区依赖地下水的生态系统研究:以敦煌盆地为例

Arid

	干旱内陆区依赖地下水的生态系统研究:以敦煌盆地为例
其他题名	GROUNDWATER-DEPENDENT ECOSYSTEMS IN ARID INLAND ZONES: A CASE STUDY AT THE DUNHUANG BASIN, NORTHWESTERN CHINA
	陈伟涛 1; 王焰新 2; 孙自永 3; 李亮 3; 黎志恒 4; 杨俊仓 4; 赵成 4
来源期刊	第四纪研究
ISSN	1001-7410
出版年	2014
卷号	34 期号:5 页码:950-958
中文摘要	在干旱内陆盆地生态水文学研究中,地下水的生态价值日益受到重视。论文以敦煌盆地为研究区,综合潜水埋深和水文地球化学调查、天然植物样方调查以及高空间分辨率遥感技术,从地下水属性变化对天然植物生长的影响以及依赖于地下水的植被生态系统制图等两个方面,开展了依赖地下水的植被生态系统研究。结果表明,以地下水潜水埋深和矿化度为代表的地下水属性与天然植被组成的系统是复杂的非线性系统,由多个相互作用的属性构成;当该系统远离平衡态时,控制系统状态的是多种地下水属性的组合,属性组合的微小涨落可能导致系统状态的较大差异;该系统状态的变化不具有等比例变化特征。植被覆盖度随潜水埋深和矿化度变化具有随机性、确定性和混沌特征。综合考虑研究区植物对地下水的依赖程度、植物对地下水的利用方式、地下水的排泄方式,以及植物群落空间分布格局,结合野外调查数据,完成了研究区依赖地下水的植被生态系统制图。结果表明,研究区除部分河、湖沿岸的植被生态系统外,其余2270.5km~2面积都高度依赖地下水,占总面积的88%。
英文摘要	In ecohydrological studies of arid inland basins, there is a growing emphasis on the ecological value of groundwater. In this present study, Dunhuang basin, located in the lower reach of the Sule River in northwestern China,was selected to study on the groundwater-dependent ecosystems (GDEs),focusing on effects of groundwater attribute on natural vegetation growing and the GDEs mapping. Hydrology investigation, natural vegetation investigation, and high spatial resolution remote sensing technique were conducted jointly. The vegetation investigation routes were developed in a radial distribution. In total 165 points were surveyed from May to June in 2011,including vegetation species, vegetation community structure (density, height, crown diameter),vegetation fraction, dominant vegetation species and community structure, and the vegetative growing state. The sampling size of forest land, shrub, and herb was set to 20 m * 20m, 10m10m,and 3~5m3~5m, respectively. A Garmin GPSMAP 60CSx was used to record the longitude and latitude of each point. The groundwater levels of the 58 points were measured in situ, and shallow groundwater samples were collected. Groundwater sampling and vegetation investigation was conducted at the same time. Groundwater samples were taken from artificial trenches, wells, or springs. Fifty milliliter polyethylene bottles used to collect water samples for major constituent analysis were cleansed with distilled water before sampling and then rinsed 3 times with water from the sampling point. Then, all sample bottles were filled with samples after filtration with 0. 45 mum membrane filters and sealed immediately with Parafilm. Three water samples were collected for each sample point : one acidified to PH less than 2 using 1: 1 pure HNO_3~- for cation analysis, and the other two for analysis of anions. The results clearly demonstrated that there are close relations between the groundwater circulation feature and the GDEs. Vegetation fraction changes present randomness, deterministic, and chaos feature when the groundwater attributes changing. There are non-linear linkages between the groundwater attributes and vegetation distribution. The groundwater-natural vegetation system should be considered as a complex, nonlinear system composed of multiple interacting attributes with a high degree of intrinsic randomness. When the system is far from equilibrium, the state of the system is controlled by a combination of groundwater attributes. In addition, changes in one aspect of the system do not affect the other attributes in a direct, one-to-one relationship. According to the dependency of natural vegetation on groundwater, the usage formation, discharge formation of groundwater, and the spatial distribution pattern of vegetation community, the map for GDVEs was obtained successfully. The results show that the vegetation, 2270. 50km~2, depends on the groundwater highly except some of the vegetation along rivers and lakes in the area.
中文关键词	地下水流动系统 ; 依赖地下水的生态系统 ; 敦煌盆地 ; 湿地 ; 遥感
英文关键词	groundwater flow system groundwater-dependent ecosystems Dunhuang basin wetland remote sensing
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:5235970
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231017
作者单位	1.中国地质大学(武汉)计算机学院/国家遥感中心地壳运动与深空探测部, 武汉, 湖北 430074, 中国; 2.中国地质大学(武汉)环境学院, 生物地质与环境地质国家重点实验室, 武汉, 湖北 430074, 中国; 3.中国地质大学(武汉)环境学院, 武汉, 湖北 430074, 中国; 4.甘肃省地质环境监测院, 兰州, 甘肃 730050, 中国
推荐引用方式 GB/T 7714	陈伟涛,王焰新,孙自永,等. 干旱内陆区依赖地下水的生态系统研究:以敦煌盆地为例[J],2014,34(5):950-958.
APA	陈伟涛.,王焰新.,孙自永.,李亮.,黎志恒.,...&赵成.(2014).干旱内陆区依赖地下水的生态系统研究:以敦煌盆地为例.第四纪研究,34(5),950-958.
MLA	陈伟涛,et al."干旱内陆区依赖地下水的生态系统研究:以敦煌盆地为例".第四纪研究 34.5(2014):950-958.