ISWC OpenIR  > 水保所知识产出(1956---)
基于土地利用/覆被变化的流域景观格局与水沙响应 关系研究
刘晓君1; 李占斌1,2; 李鹏2; 张铁钢2; 徐国策2
2016
Source Publication生态学报
Volume36Issue:18Pages:5691-5700
Abstract

以黄河流域的2 个典型流域为研究对象,借助GIS 和Fragstats 平台与长系列水沙数据,分析流域景观格局和水沙变化特
征,并探讨景观指数与径流输沙的关系。结果表明: ( 1) 两个流域优势景观类型为草地, 1985—2010 年间变化最大的景观类型
分别为未利用土地( 25a 变幅为453. 94 km2 ) 和耕地( 25a 变幅为52. 85 km2 ) ; ( 2) 秃尾河流域景观均向规则、高连通和高度聚集
的方向发展。孤山川控制流域内景观多样性和聚集度逐渐增加,整体向好。秃尾河流域景观稳定性指数高于孤山川流域,两流
域草地和未利用土地地稳定性均呈增加趋势,而城乡工矿用地则相反。( 3) 流域年径流量和泥沙量均呈现逐年同步减小的趋
势。秃尾河年径流量明显高于孤山川,但孤山川流域泥沙量与秃尾河流域相近。两流域径流泥沙相关关系显著,秃尾河流域相
关系数( 0. 48) 明显低于孤山川流域( 0. 85) 。( 4) 景观指数与径流量、泥沙量呈显著线性相关,其中景观多样性相关的指数
SHDI、SIDI、SHEI 和SIEI 均与径流呈极显著正相关,而泥沙仅与CONTAG、COHESION 呈显著负相关。

Other Abstract

Serious soil erosion by the Yellow River has not only led to ecological deterioration,but also heightened the risk
of floods downstream. Land use change is the main factor responsible for the ecological and environmental issues.
Sedimentation and runoff variation caused by land use change has emerged as one of the popular topics of discussion.
Researchers usually select landscape pattern as an important indicative factor of land use for analyzing the tense relationship
between the socioeconomic system and natural ecosystem. The purpose of this study was to determine the characteristics of
landscape patterns,runoff,and sedimentation changes,and discuss the relationship between landscape indices ( LIs) ,
runoff,and sedimentation. Two typical watersheds ( Tuweihe and Gushanchuan watersheds) in the Yellow River basin were
selected as the study sites. Long-term historical land use,runoff,and sediment data ( 1985—2010) were analyzed relying
on geographic information system and Fragstats software. Landscape indices included NP ( number of patches) ,PD ( patch
density) ,LPI ( largest patch index) ,LSI ( landscape shape index) ,PAFRAC ( perimeter area fractal dimension) ,
CONTAG ( contagion index) ,COHESION ( patch cohesion index) ,DIVISION ( landscape division index) ,and SHDI
( Shannon's diversity index) . The following results were obtained: ( 1) Grassland was the dominant landscape in the two
watersheds. Unused land in Tuweihe watershed and farmland in Gushanchuan watershed experienced the greatest changeswith areas of 453. 94 km2 and 52. 85 km2,respectively,from 1985 to 2010. Deforestation and reconversion of cultivated
land to forest and grassland were the main reasons for the land cover change. ( 2) The calculation of coefficient of variation
( CV) revealed that LPI of Tuweihe watershed had intermediate variability ( CV = 27. 29%) ,while all the others
including LIs of Gushanchuan watershed had little variability ( CV < 10%) . The landscape in Tuweihe watershed tended
to become regular,connected,and aggregate,indicating that with time,the influences of human activities on the area were
growing. The diversity and aggregation index increased and the landscape pattern improved. For grassland and unused land,
the landscape stability had been increasing gradually but decreased as farmland and urban and rural land became
increasingly affected by human activities. The landscape stability of Tuweihe watershed was higher than that of Gushanchuan
watershed. ( 3) The annual runoff and sediments decreased gradually. The runoff in Tuweihe watershed was greater than
that in Gushanchuan watershed,and the sediment yields of the two watersheds were similar owing to the bigger area of
farmland in Gushanchuan watershed and more check dams in Tuweihe watershed. A Pearson correlation analysis showed that
there was a significant relationship between annual runoff and sedimentation ( P < 0. 01) . The coefficient of determination
in Tuweihe watershed ( 0. 48) was obviously lower than that in Gushanchuan watershed. ( 4 ) The Pearson correlation
analysis showed that the LIs were in significant linear relationship with runoff and sedimentation ( P < 0. 01) . SHDI,SIDI,
SHEI,and SIEI were positively correlated with annual runoff,whereas CONTAG and COHESION were negatively correlated
with annual sedimentation. Compared to annual sedimentation,the correlation coefficients for LIs and runoff were higher,
indicating that the land use /cover change affected runoff more than it affected sedimentation. Our results suggest that
discussing the relationship between the LIs and runoff and sedimentation could provide scientific basis for the prevention and
treatment of water loss and soil erosion.

Keyword土地利用/覆被变化 景观格局 径流量 输沙量 黄河流域
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8628
Collection水保所知识产出(1956---)
Affiliation1.中国科学院水利部水土保持研究所
2.西安理工大学西北水资源与环境生态教育部重点实验室
First Author Affilication中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
刘晓君,李占斌,李鹏,等. 基于土地利用/覆被变化的流域景观格局与水沙响应 关系研究[J]. 生态学报,2016,36(18):5691-5700.
APA 刘晓君,李占斌,李鹏,张铁钢,&徐国策.(2016).基于土地利用/覆被变化的流域景观格局与水沙响应 关系研究.生态学报,36(18),5691-5700.
MLA 刘晓君,et al."基于土地利用/覆被变化的流域景观格局与水沙响应 关系研究".生态学报 36.18(2016):5691-5700.
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