干旱区生态环境知识资源中心(Arid): 基于TVDI的甘肃省农业旱情特征及其影响因素

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	基于TVDI的甘肃省农业旱情特征及其影响因素
其他题名	Agricultural drought characteristics and its influencing factors in Gansu Province based on TVDI
	庞素菲 1; 魏伟 1; 郭泽呈 1; 张静 1; 颉斌斌 2
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2019
卷号	38 期号:6 页码:1849-1860
中文摘要	为探讨甘肃省农业旱情状况及其影响因素,本文利用归一化植被指数和地表温度构建特征空间,计算温度植被干旱指数(TVDI),对20012016年旱情进行评估,并定量分析其影响因素。结果表明:从时间尺度上看,甘肃每年均有干旱发生,且轻旱和中旱面积占比最大;从空间分布上看,干旱分布具有明显的地域分异规律,自东南向西北呈逐渐加重趋势,河西走廊大部分地区旱情较重,祁连山地区和甘南高原区很少有干旱发生;干旱出现区和非干旱出现区的形成是海拔、气温、降水、下垫面、人为干扰等多种因素综合影响的结果,其中海拔低、气温高、降水少、植被类型以荒漠为主、土地利用以沙地和戈壁为主的地区干旱面积大;气温、降水、海拔、坡度、植被类型、土地覆盖类型是甘肃省农业干旱的主要影响因素,其他因素与主要因素共同叠加,造成了甘肃省农业干旱整体上呈东南润西北旱的格局;利用基于植被和温度相结合的TVDI指数表征甘肃省农业干旱旱情,其计算过程简单、明了,计算结果科学准确,是今后气象部门进行旱情监测时值得尝试和应用的方法,研究结果可为甘肃省抗旱防旱和农业生产政策的制定提供科学参考。
英文摘要	To understand the agricultural drought situation and its influencing factors in Gansu Province,the feature space was constructed by Normalized Difference Vegetation Index and Land Surface Temperature.Temperature Vegetation Dryness Index (TVDI) was calculated to evaluate the drought event during 2001 - 2016,and its influencing factors were quantitatively analyzed.Drought occurred every year in Gansu,with the proportion of lightly and moderately dry acreage being largest.Drought had obvious regional differentiation in space,gradually increased from southeast to northwest.The drought was heavy in most parts of Hexi Corridor and rarely occurred in Qilian Mountains and Gannan plateau.The formation of drought and non-drought occurrence regions was the result of a combination of many factors such as altitude,temperature,precipitation,underlying surface,and human disturbance.Large acreage of drought usually occurred in regions with lower altitude,higher temperature,less precipitation,sparse vegetation and land types dominated by sand and Gobi.Temperature,precipitation,altitude,slope,vegetation types and land cover types were the major factors influencing agricultural drought.Other factors were superimposed together with major factors,resulting in the overall pattern ofsoutheast wet and northwest droughtin Gansu.Using TVDI index based on the combination of vegetation and temperature to reflect agricultural drought situation,it is simple in calculation and its results are scientific and accurate.This method is worth to be tried and used in drought monitoring of meteorological department in the future.Our results provide scientific reference for preventing drought and formulating agricultural production policies.
中文关键词	农业干旱 ; 遥感 ; 地理因素 ; 甘肃省
英文关键词	TVDI agricultural drought remote sensing TVDI geographical factor Gansu Province
语种	中文
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6508742
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315973
作者单位	1.西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国; 2.兰州城市学院城市经济与旅游文化学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	庞素菲,魏伟,郭泽呈,等. 基于TVDI的甘肃省农业旱情特征及其影响因素[J]. 西北师范大学,2019,38(6):1849-1860.
APA	庞素菲,魏伟,郭泽呈,张静,&颉斌斌.(2019).基于TVDI的甘肃省农业旱情特征及其影响因素.生态学杂志,38(6),1849-1860.
MLA	庞素菲,et al."基于TVDI的甘肃省农业旱情特征及其影响因素".生态学杂志 38.6(2019):1849-1860.