干旱区生态环境知识资源中心(Arid): A composite method to identify desertification 'hotspots' and 'brightspots'

Arid

DOI	10.1002/ldr.3290
	A composite method to identify desertification 'hotspots' and 'brightspots'
	Singh, Rimjhim Bhatnagar; Ajai
通讯作者	Singh, Rimjhim Bhatnagar
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2019
卷号	30 期号:9 页码:1025-1039
英文摘要	Desertification has become one of the greatest environmental concerns of our planet. Implementation of the action plans for arresting land degradation and for employing rehabilitation measures over a large spatial scale is not feasible due to the amount of time, effort, and cost involved. However, if the 'hotspots' the 'brightspots', and the 'potential areas' are identified, the task would be relatively easy. In this paper, a method is proposed to identify the pieces of degraded land with varying severity levels (in terms of 'hotspots', 'brightspots', and 'potential areas'), using Bowen ratio, land surface temperature (LST), R-a, and Normalized Difference Vegetation Index (NDVI). Although the zone falls in the semiarid class, the microclimate analysis of the study area revealed high aridity. The combined analysis of LST, R-a, and NDVI helped in identifying the areas susceptible to land degradation (particularly, salinization and water erosion). Analysis of the vegetation type and condition showed their variable roles towards the protection of soil from erosion, drought, and fire. Using these analyses together with the ecosystemic approach of Bowen ratio, 'hotspots', 'brightspots', and 'potential areas' were identified at the pixel level. For validation, Desertification Status Map was employed. The investigations revealed that around 49% of the study area falls under the category of 'hotspots' (with an error estimate of 13%) and another 49% as 'brightspots'. The findings revealed that instead of targeting the entire area for implementation of the mitigation measures with the same efforts, it would be better to focus on the specific pieces of land ('hotspots') to optimally utilize the available resources.
英文关键词	'brightspots' 'hotspots' Bowen ratio desertification land degradation land use
类型	Article
语种	英语
国家	India
收录类别	SCI-E
WOS记录号	WOS:000470932100001
WOS关键词	SURFACE-TEMPERATURE ; VEGETATION ; CLIMATE ; DESERT
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217463
作者单位	ISRO, Space Applicat Ctr, Ahmadabad 380015, Gujarat, India
推荐引用方式 GB/T 7714	Singh, Rimjhim Bhatnagar,Ajai. A composite method to identify desertification 'hotspots' and 'brightspots'[J],2019,30(9):1025-1039.
APA	Singh, Rimjhim Bhatnagar,&Ajai.(2019).A composite method to identify desertification 'hotspots' and 'brightspots'.LAND DEGRADATION & DEVELOPMENT,30(9),1025-1039.
MLA	Singh, Rimjhim Bhatnagar,et al."A composite method to identify desertification 'hotspots' and 'brightspots'".LAND DEGRADATION & DEVELOPMENT 30.9(2019):1025-1039.