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	黑河流域中游地区生态环境变化特征及驱动力
	周沙 ; 黄跃飞 ; 王光谦 ; ZHOU Sha ; HUANG Yue-fei ; WANG Guang-qian
	2016-03-30 ; 2016-03-30
关键词	黑河流域 植被覆盖度 时空变化特征 灰色关联度 Heihe River Basin vegetation cover spatiotemporal variation grey correlation model X171
其他题名	Changes in the ecological environment and there determining factors in the middle Heihe River Basin
中文摘要	多角度分析黑河流域中游地区植被覆盖度时空变化特征,并建立基于演变过程的生态系统灰色关联度模型,分析生态环境变化的驱动因子.研究表明:1)1999~2008年,平原旱地、低覆盖草地、有林地年最大归一化差异植被指数(NDVI)增幅较大,达0.1~0.2,疏林地2004年后保持高速增长,年最大NDVI增幅0.208,增长了77.6%;2)张临高盆地年最大植被覆盖度线性拟合年均增幅0.0063,生长季节平均植被覆盖度在小幅波动中呈现稳定增长趋势,拟合优度达0.74;甘州区生态治理成效最显著,年增长幅度集中在0.03~0.3;临泽县和高台县以增长为主,但局部过渡带地区下降幅度达0.1~0.3;3)植被7~10月覆盖度呈现明显增长趋势,峰值从6~7月延迟到7~8月,2007年达0.39;植被覆盖度分级结构呈现优化趋势,极低覆盖度植被逐渐转化为低覆盖度植被,2007年相比2000年降低25%以上,高覆盖度植被1998~2008年间增长约16%;4)根据3种植被覆盖度变化与各驱动因子关联分析,气象水文因子主要包括降雨量、蒸发量、径流量,最大关联度分别为0.91、-0.83、0.76,社会经济因子主要包括农作物播种面积、第一产业产值、农业科技水平,最大关联度分别为-0.81、0.78、0.81.; This paper analyzed several aspects of the spatio-temporal variations in the vegetation cover in the middle Heihe River Basin,and developed a grey correlation model of ecosystem to identify the determining factors.The results demonstrated that 1) the annual maximum normalized difference vegetation index(NDVI) increased considerably in upland,grassland with low vegetation cover,and forested area,by about 0.1~0.2;while sparse woodland has maintained a rapid growth since 2004with the annual maximum NDVI increased by 0.21;2) the annual maximum vegetation cover for the study area as a whole has increased by 0.0063per annum,the change is most significant in Ganzhou District,where the annual growth was mostly around 0.03~0.3,however,for some oasis-desert transition zones in Linze and Gaotai,the vegetation cover decreased by 0.1~0.3;3) the vegetation cover from July to October showed significant growth trends,the peak increased and delayed about one month,reaching 0.39in 2007;the hierarchical structure of the annual maximum vegetation cover optimized,the lowest vegetation cover gradually transformed into low vegetation cover,decreased by 25% from 2000to 2007,and the highest vegetation cover increased approximately 16% from 1998to 2008;4) the results of correlation analysis showed that the main meteorological and hydrological factors were rainfall,evaporation and runoff,with the maximum correlations of 0.91,-0.83,0.76,respectively,and that the main socio-economic factors were agricultural acreage,primary industry and the level of agricultural science and technology,with the maximum correlation were-0.81,0.78,0.81,respectively.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/148685]
专题	清华大学
推荐引用方式 GB/T 7714	周沙,黄跃飞,王光谦,等. 黑河流域中游地区生态环境变化特征及驱动力[J],2016, 2016.
APA	周沙,黄跃飞,王光谦,ZHOU Sha,HUANG Yue-fei,&WANG Guang-qian.(2016).黑河流域中游地区生态环境变化特征及驱动力..
MLA	周沙,et al."黑河流域中游地区生态环境变化特征及驱动力".(2016).

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