文章摘要
余军林,罗娅,赵志龙,杨月燕,罗旭琴.水保监测与应用技术基于TVDI和Landsat-8的喀斯特峡谷区干旱监测[J].水土保持通报,2019,(1):104~113
水保监测与应用技术基于TVDI和Landsat-8的喀斯特峡谷区干旱监测
Drought Monitor in Karst Gorge Area Based on Landsat-8 and TVDI
投稿时间:2018-07-17  修订日期:2018-08-11
DOI:10.13961/j.cnki.stbctb.2019.01.017
中文关键词: 喀斯特峡谷区  温度-植被干旱指数(TVDI)  干旱监测  分布特征
英文关键词: karst gorge area  temperature vegetation dryness index(TVDI)  drought monitor  distribution characteristics
基金项目:国家十三五重点研发计划课题"喀斯特高原石漠化综合治理生态产业技术与示范"(2016YFC0502607);国家自然科学基金项目"喀斯特江河上游区植被恢复的水文过程综合响应研究"(41761003);贵州省普通高等学校科技拔尖人才支持计划(黔教合KY字[2018]042);贵州师范大学2015年博士科研启动项目(0514177)
作者单位E-mail
余军林 贵州师范大学 地理与环境科学学院, 贵州 贵安新区 550025  
罗娅 贵州师范大学 地理与环境科学学院, 贵州 贵安新区 550025 luoya2002@163.com 
赵志龙 贵州师范大学 地理与环境科学学院, 贵州 贵安新区 550025  
杨月燕 贵州师范大学 地理与环境科学学院, 贵州 贵安新区 550025  
罗旭琴 贵州师范大学 地理与环境科学学院, 贵州 贵安新区 550025  
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中文摘要:
      [目的]探索适用于喀斯特地表干旱遥感监测的技术方法,为石漠化治理监测以及抗旱减灾工作提供技术参考。[方法]运用大气校正法反演地表温度(Ts)和归一化植被指数(NDVI),构建花江峡谷区2013年、2014年和2015年旱季的温度-植被干旱指数(TVDI),并结合地面实测数据对TVDI作为旱情指标进行了验证。[结果]①反演的TVDI与同时期实测的0-10 cm土壤体积含水量数据呈显著的负相关关系(p<0.05)。②3个时期的干旱等级以轻旱为主;轻旱、干旱和重旱累计面积占全区比重大,呈现2014年旱情重于2015年和2013年的特点。③3个时期的旱情在空间分布上,湿润和正常等级在地形上主要分布在海拔900~1 100 m地带,15°~35°的斜坡和缓陡坡,以及阴坡和半阳坡;在石漠化等级上,主要分布在无石漠化区、轻度石漠化区和潜在石漠化区;在土地利用类型中主要分布在有林地、旱地、灌木林地和其他林地。轻旱、干旱和重旱在地形上主要分布在海拔500~900 m,6°~25°的缓坡和斜坡,以及阳坡和半阳坡;在石漠化等级上,轻旱和干旱主要分布在轻度石漠化区、潜在石漠化区、中度石漠化区和强度石漠化区,重旱主要分布在非喀斯特区;在土地利用类型上,轻旱、干旱和重旱主要分布在旱地、园地和其他林地。[结论]TVDI可作为研究区的干旱监测指标,基于TVDI和Landsat-8数据的干旱监测方法在喀斯特峡谷区具有一定适用性。
英文摘要:
      [Objective] To explore the technology and method of remote sensing monitoring of karst surface drought, in order to provide technical reference for the monitoring of rocky desertification control and drought mitigation. [Methods] The atmospheric temperature correction method was used to derive the surface temperature (Ts) and the normalized difference vegetation index (NDVI) to construct the temperature vegetation dryness index (TVDI) of Huajiang gorge in the dry season of 2013, 2014 and 2015. The TVDI was validated as a drought indicator based on the ground measured data. [Results] ① The TVDI showed a significant negative correlation with the measured soil water content of 0-10 cm in the same period (p<0.05). ② Light drought was the main drought grade in the three periods, and the cumulative areas of light drought, drought and heavy drought accounted for a large proportion of the whole region. It showed that the drought in 2014 was heavier than drought in 2015 and 2013. ③ The wet and normal grades were mainly distributed on slopes and gentle steep slopes of 900~1100 m height above sea leval, slope of 15°~35°, and shady and semi-sunny slopes. In terms of rock desertification, it was mainly distributed in non-rocky desertification areas, light rocky desertification areas and potential rocky desertification areas. Land use types were mainly forest land, dry land, shrubbery land and other forest land. Light drought, drought and heavy drought were mainly distributed on gentle slopes, and slopes of 6°~25°, 500~900 m height as well as sunny and semi-sunny slopes. Light drought and drought were mainly distributed in light desertification area, the potential rocky desertification area, the moderate rocky desertification area and the intensity rocky desertification area. The heavy drought was mainly distributed in the non-karst area. In terms of land use types, the light drought, drought and heavy drought were mainly distributed in dry land, gardens and other wooded land. [Conclusion] TVDI can be used as the drought monitor index in the study area. The drought monitor method based on Landsat-8 data and TVDI is applicable in the karst gorge area.
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