Analysis on the Spatio-temporal Variation of Grassland Cover Using SPOT NDVI in Qilian Mountains
Received date: 2009-08-01
Revised date: 2010-03-01
Online published: 2010-09-25
Based on RS and GIS technology, the grassland cover spatio-temporal variation of Qilian Mountains was analyzed using cumulative average method, average method, trend line analysis, image differencing with the SPOT VGT-NDVI data, and Hurst exponents were utilized to predict the future trends of grassland cover change in Qilian Mountains. The results show that: (1) the grassland vegetation NDVI has been in creused in Qilian Mountains from 1999 to 2007. The increase rate of annual average NDVI and growing season NDVI in typical steppe and plain grasslands was higher than that in alpine meadow and desert grasslands. The increased and reduced areas were 69776 km2 and 15928 km2, respectively. The grassland vegetation NDVI in Lenglong Ridge, Laji Mt., Datong Mt., Daban Mt., South Qinghai Mt., Zongwulong Mt., Tuolai Mt., South Tuolai Mt. was improved, and comparatively, the grassland vegetation NDVI was reduced in Wushao Ridge, the valleys of Datong River, Shiyang River, Heihe River, Beida River and Shule River and the surrounding areas of Qinghai Lake. (2) The grassland vegetation NDVI of Qilian Mountains with a single peak curve during the year changer in Qilian Mountains. (3) The grassland cover in Lenglong Ridge, Zongwulong Mt., South Qinghai Mt., Jingtie Mt., Laji Mt., Wushao Ridge; the valley of Datong River, Hei River, Beida River, Shule River and the surrounding areas of Qinghai Lake will be sustainably improved in the future, and the grassland cover will be degraded in South Zoulang Mt., Tuolai Mt., South Tuolai Mt., Datong Mt. and the valleys of Huangshui and Shiyang rivers. The cover of desert grasslands and alpine meadow grasslands will be improved, and the typical steppe and plain grasslands will be degraded in the future.
Key words： grassland; Hurst exponents; Qilian Mountains; spatio-temporal variations; SPOT NDVI
DAI Shengpei, ZHANG Bo, WANG Haijun, WANG Yamin, LI Dan, WANG Xingmei . Analysis on the Spatio-temporal Variation of Grassland Cover Using SPOT NDVI in Qilian Mountains[J]. PROGRESS IN GEOGRAPHY, 2010 , 29(9) : 1075 -1080 . DOI: 10.11820/dlkxjz.2010.09.008
[1] 查勇,Jay Gao，倪绍祥.n际草地资源遥感研究新进展. 地理科学进展，2003, 22(6): 607-617.
[2] 郭广猛，谢高地，甄霖.径河上游固原地区的NDVI变化 与降水的相关性研究.资源科学，2007, 29(2): 178-182.
[3] Tucker C J, Townshend J R G. Afiican land-cover classifi- canon using satellite data. Science, 1985, 227 (4685): 369-375.
[4] 于小飞，孙睿，陈永俊，等.乌审旗植被覆盖度动态变化 及其与降水量的关系.资源科学，2006, 28(4): 31-37.
[5] 王宏，李晓兵，莺歌，等.基于NOAA NDVI的植被生长 季模拟方法研究.地理科学进展，2006, 25(6): 21-32.
[6] 卫亚星，王莉雯，刘闯.基于MODIS NDVI时序数据的青 海省草地分级.资源科学，2008, 30(5): 688-693.
[7] 毛飞，侯英雨，唐}u浩，等.基于近20年遥感数据的藏北 草地分类及其动态变化.应用生态学报，2007, 18 (8): 1745-1750.
[8] 李忠峰，蔡运龙.陕北榆林地区土地覆被变化分析.地理 科学进展，2006, 25(6): 102-107.
[9] 张又江，m志强.青藏m原中东邵植被覆盖对水热条件 的响应研究.地理科学进展，200s, 24(5): 13-23.
[10] 齐述华，王常耀，生铮，等.利用NDVI时间序列数据分 析植被长势对气候因子的响应.地理科学进展，2004, 23(3): 91一100.
[11] 武永峰，李茂松，刘布春，等.基于NOAA NDVI的中国 植被绿度始期变化.地理科学进展，2008, 27(6): 32-40.
[12] 贾文雄，何元庆，李宗省，等.祁连山区气候变化的区域 差异特征及突变分析.地理学报，2008, 63(3): 257-269.
[13] 《中国自然地理》编写组.中国自然地理.2版.北京:高 等教育出版社，1994.
[14] 甘肃草原总站.H-肃草地资源.兰州:甘肃科学技术出 版社,1999.
[15] 程瑛，徐殿祥，郭妮.近20年来祁连山区植被变化特征 分析.干旱区研究，2008, 2s(6): 772-777.
[16] 邓朝平，郭妮，王介民，等.近20余年来西北地区植被 变化特征分析.冰川冻土，2006, 28(5): 686-693.
[17] Stow D, Daeschner S, Hope A, et al. Variability of the sea- sonally integrated normalized difference vegetation index across the north slope of Alaska in the 1990s. Internation- al Journal of Remote Sensing, 2003, 24(5): 1111-1117.
[18] 马明国，王建，王雪梅.基于遥感的植被年际变化及其 与气候关系研究进展.遥感学报，2006, 10(3): 421-431.
[19] 宋怡，马明国.基于SPOT VEGETATION数据的中国西 北植被覆盖变化分析.中国沙漠,2007, 27(1): 89-94.
[20] 章明，张培松，刘洪斌，等.基于SPOT VEGETATION数 据的海南岛年际植被变化研究.西南大学学报:自然科 学版，2009, 31(3): 148-1s3.
[21] 江田汉，邓莲堂.Hurst指数估计中存在的若十问题:以 在气候变化研究中的应用为例.地理科学，2004, 24(2): 177-182.
[22] 张月从，赵志强，李双成，等.基于SPOT NDVI的华J匕J匕 部地表植被覆盖变化趋势.地理研究，2008, 27(4): 745- 755.
[23] 孙艳玲，延晓冬，谢德体.基于因子分析方法的中国植 被NDVI与气候关系研究.山地学报，2007, 225(1): s4- 63.
[24] 张小明，魏锋，陆燕.祁连山近45年降水异常的气候特 征.干旱气象，2006, 24(3): 35-41.
[25] 郭妮，杨兰芳，李民轩.利用气象卫星资料研究祁连山 区植被和积雪变化.应用气象学报，2003, 14 (6): 700- 707.
/
| 〈 |
|
〉 |