摘要
基于3S(RS、GIS、GPS)技术,并结合数理统计和景观格局数量分析方法,运用2000年CBERS、2005年CBERS和2010年TM遥感影像对塔里木河干流10年耕地面积的时空变化、景观格局及其生态影响进行了定量研究。结果表明:(1)在过去10年中,塔河干流耕地面积明显增加。具体地,2000年耕地面积为1.61×105hm2,所占研究区总面积比例为3.89%,至2010年增加至3.27×105hm2,比例为7.88%,年增长率为1.66×104hm2a-1;(2)塔里木河干流耕地空间变化的区域差异明显。A、B、C、D断面耕地分布宽幅分别为21～23 km、11～16 km、6～17 km、4～9 km,塔河北岸C、D断面和南岸D、E断面耕地的增速最快;(3)2000-2010年耕地的斑块数不断增加,面积加权形状指数增大,形状趋于不规则。景观聚集度适中,景观内斑块大小分布均匀性降低,景观多样性下降,各个景观类型所占比例趋于不协调。
Based on the CBERS images in 2000, CBERS images in 2005 and TM images in 2010, dynamic change in cultivated land and landscape pattern along the mainstream of the Tarim River from 2000 to 2010 were studied using the 3S technology and the analytical method of combining the mathematical statistics and landscape pattern quantity analysis. Results show that the area of the cultivated land along the mainstream of the Tarim River varied significantly,increasing from 1.61 ×10^5hm^2or3.89% of the total land area in 2000 to 3.27 ×10^5hm^2or7.88% in 2010, that is, by 1.66× 10^4 hm^2 a^-1; spatial variation of the cultivated land was also significant between sections of the river. At Sections A, B, C and D cultivated land spread as wide as 21 -23 kilometer, 11 - 16 kilometer, 6 - 17 kilometer, and 4 -9 kilometer, respectively and the spread was the fastest at Sections C and D on north bank of the river and Sections D and E on the south bank. During the period from 2000 to 2010, the cultivated land increased steadily in number of patches with its area weight shape index rising; and its patches becoming more irregular in shape. On the whole, the landscape aggregation de- gree was moderate; the distribution uniformity of patches various in size within a landscape and landscape diversity de- clined; and the proportions the various types of landscapes account for became less harmonious.
出处
《土壤学报》
CAS
CSCD
北大核心
2013年第3期492-500,共9页
Acta Pedologica Sinica
基金
国家重点基础研究发展规划(973计划)(2009CB421308)
国家自然科学基金项目(30970549
41171427)
水利部公益性行业科研专项(201101049)共同资助
关键词
耕地
时空变化
景观格局
塔里木河干流
Cultivated land
Spatial-temporal variation
Landscape pattern
Mainstream of the Tarim River
