黑河中游植被覆盖率变化趋势及其驱动因子分析

被引:5
作者
张更喜
粟晓玲
马心依
机构
[1] 西北农林科技大学水利与建筑工程学院
关键词
植被覆盖率; 水位埋深; 耗水量; 降水量; 绿洲区; 荒漠区;
D O I
暂无
中图分类号
Q948 [植物生态学和植物地理学];
学科分类号
071012 ; 0713 ;
摘要
利用2002~2011年的黑河干流中游归一化值被指数数据获得植被覆盖率变化趋势,选取合适的NDVI阈值将整个区域划分为"绿洲区"和"荒漠区",并分别探讨了地下水埋深、中游耗水量及累积降水量对两种区域面积和植被覆盖率变化的影响。结果表明:黑河干流中游植被覆盖率整体呈增长趋势,由2002年的32%增长到了2011年的36%,对植被覆盖率增长贡献最大的因素为绿洲区扩张,10年间绿洲区面积占比增长了10%;影响绿洲扩张的主要因素为地下水位埋深和中游耗水量,绿洲区植被覆盖率变化较小,可忽略其影响。荒漠区植被覆盖率的变化主要受累积降水量影响。利用地下水位埋深、中游耗水量、累积降水量可预测区域植被覆盖率的变化趋势,区分人类活动和气候变化对区域植被覆盖率的影响是可行的。
引用
收藏
页码:251 / 257
页数:7
相关论文
共 27 条
[11]   Spatio-temporal analyses of cropland degradation in the irrigated lowlands of Uzbekistan using remote-sensing and logistic regression modeling [J].
Dubovyk, Olena ;
Menz, Gunter ;
Conrad, Christopher ;
Kan, Elena ;
Machwitz, Miriam ;
Khamzina, Asia .
ENVIRONMENTAL MONITORING AND ASSESSMENT, 2013, 185 (06) :4775-4790
[12]   Assessing Land Degradation/Recovery in the African Sahel from Long-Term Earth Observation Based Primary Productivity and Precipitation Relationships [J].
Fensholt, Rasmus ;
Rasmussen, Kjeld ;
Kaspersen, Per ;
Huber, Silvia ;
Horion, Stephanie ;
Swinnen, Else .
REMOTE SENSING, 2013, 5 (02) :664-686
[13]  
Remote sensing of vegetation responses to flooding of a semi-arid floodplain: Implications for monitoring ecological effects of environmental flows[J] . Neil C. Sims,Matthew J. Colloff.Ecological Indicators . 2011
[14]  
Determination of groundwater recharge regime and flowpath in the Lower Heihe River basin in an arid area of Northwest China by using environmental tracers: Implications for vegetation degradation in the Ejina Oasis[J] . Dajun Qin,Zhanfeng Zhao,Liangfeng Han,Yunping Qian,Lu Ou,Zhongqiang Wu,Mingchuan Wang.Applied Geochemistry . 2012 (6)
[15]  
Vegetation responses to integrated water management in the Ejina basin, northwest China[J] . Yichi Zhang,Jingjie Yu,Ping Wang,Guobin Fu.Hydrological Processes . 2011 (22)
[16]  
On the coupling between vegetation and the atmosphere[J] . Isabella M. Angelini,Michael Garstang,Robert E. Davis,Bruce Hayden,David R. Fitzjarrald,David R. Legates,Steven Greco,Stephen Macko,Vickie Connors.Theoretical and Applied Climatology . 2011 (1-2)
[17]  
Groundwater Depth and Vegetation in the Ejina Area, China[J] . XiaoM. Jin,MichaelE. Schaepman,JanG. P. W. Clevers,Z. Bob Su,G.C. Hu.Arid Land Research and Management . 2011 (2)
[18]  
Environmental changes after ecological water conveyance in the lower reaches of Heihe River, northwest China[J] . Qiaoling Guo,Qi Feng,Jianlin Li.Environmental Geology . 2009 (7)
[19]  
Remotely-sensed groundwater evapotranspiration from alkali scrub affected by declining water table[J] . David P. Groeneveld.Journal of Hydrology . 2008 (3)
[20]  
Trends in vegetation activity and their climatic correlates: China 1982 to 1998[J] . Jingfeng Xiao,A. Moody.International Journal of Remote Sensing . 2004 (24)