干旱区生态环境知识资源中心(Arid): 西北干旱区荒漠植被生态需水量估算

Arid

	西北干旱区荒漠植被生态需水量估算
其他题名	Estimation of ecological water requirement of desert vegetation in the arid region of Northwest China
	周丹 1; 沈彦俊 2; 陈亚宁3 ; 郭英 2; 张勃 1
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2015
卷号	34 期号:3 页码:670-680
中文摘要	基于AVHRR-GIMMS和SPOT-VEGETATION两种NDVI数据计算西北干旱区生长季植被覆盖度指数(f_c),根据该指数划分阈值范围确定荒漠植被面积,并在塔里木盆地进行适用性验证。通过荒漠植被面积和参考作物蒸散量(ET_0),采用潜水蒸发模型,计算西北干旱区19822010年荒漠植被生态需水量,以期为今后西北干旱区水资源利用和管理提供科学依据。结果表明:根据.f_c确定荒漠植被面积,在西北干旱区阈值范围设为0.1 ~ 0.35较为合理;1982-2010年西北干旱区荒漠植被面积总体上变化不大,呈现增-减-增的波动趋势。高、低覆盖度荒漠植被面积多年平均值分别为234.3和448.2万hm~2;西北干旱区ET_0,空间分布总体为南疆大于北疆、东部大于西部,其中南疆、北疆及河西地区ET_0多年平均值分别为1066.9、975.6和1171.6 mm。根据ET_0数据拟合分析计算西北干旱区荒漠植被潜水蒸发量,其中南疆、北疆和河西地区低覆盖度荒漠植被潜水蒸发量多年平均值分别为75、64和82 mm,高覆盖度荒漠植被分别为275、233和299 mm; 19822010年西北干旱区荒漠植被生态需水量呈减少趋势,以0.1063亿m~3 ? a~(-1)的速率减少,多年平均生态需水量为134.13亿m~3。其中高覆盖度荒漠植被需水量多年平均为91.64亿m~3,以0.3034亿m~3 ? a~(-1)的速率减少;低覆盖度荒漠植被需水量多年平均为42.49亿m~3,以0.1972亿m~3 ? a~(-1)的速率增加。
英文摘要	In this paper, we calculated the fractional vegetation cover (f_c) within growing season in the arid region of Northwest China based on two kinds of NDVI data (AVHRR-GIMMS and SPOT-VEGETATION). The desert vegetation area was determined according to the thresholds of vegetation cover, and which was validated in the Tarim River Basin. The ecological water requirement of desert vegetation in the arid region of Northwest China was calculated using the phreatic evaporation model with the area of desert vegetation and the reference crop evapotranspiration (ET_0) during 1982-2010. The results were expected to provide evidence for water use management in this area in future. Results showed that the thresholds of f_c were reasonable to be 0.1-0.35 to determine the desert vegetation area in this area. There was no drastic change in area of desert vegetation during 1982-2010, which showed an increase-decrease-increase trend. The mean areas of high vegetation cover and low vegetation cover were 2.343 million and 4.482 million hm~2, respectively. The annual ET_0 in the Tarim River Basin was higher than that in Northern Xinjiang, and the ET_0 in eastern part was larger than that in western part. The mean annual ET_0 values in Tarim River Basin, Northern Xinjiang and Qilian-Hexi area were 1066.9,975.6, and 1171.6 mm, respectively. Phreatic evaporation of the desert vegetation in the arid region of Northwest China was calculated according to the data fitting of the ET_0. In the Tarim River Basin, Northern Xinjiang and Qilian-Hexi area, the mean annual phreatic evaporation values of the low-cover desert vegetation were 75,64 and 82 mm,respectively; the mean annual phreatic evaporation values of the high-cover desert vegetation were 275,and 233 and 299 mm,respectively. The mean annual ecological water requirement of desert vegetation was 13.413 billion m~3 in the arid region of Northwest China, with a reduced rate of 10.63 million m~3 ? a~(-1) during 1982-2010. In area with high vegetation cover, the mean annual ecological water requirement was 9.164 billion m~3,with a reduced rate of 30.34 million m~3 ? a~(-1),while that in area with low vegetation cover was 4.249 billion m~3, with an increased rate of 19.72 million m~3 ? a~(-1).
中文关键词	西北干旱区 ; 荒漠植被 ; 生态需水量 ; 潜水蒸发模型
英文关键词	the arid region of Northwest China desert vegetation ecological water requirement phreatic evaporation model
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5373446
来源机构	中国科学院新疆生态与地理研究所 ; 西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233224
作者单位	1.西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国; 2.中国科学院遗传与发育生物学研究所农业资源研究中心, 石家庄, 河北 050022, 中国; 3.中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	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]. 中国科学院新疆生态与地理研究所, 西北师范大学,2015,34(3):670-680.
APA	周丹,沈彦俊,陈亚宁,郭英,&张勃.(2015).西北干旱区荒漠植被生态需水量估算.生态学杂志,34(3),670-680.
MLA	周丹,et al."西北干旱区荒漠植被生态需水量估算".生态学杂志 34.3(2015):670-680.