학술논문
Mapping Snow Coverage, Contamination and Glacial Lakes of Eastern Himalayas: A Case Study of Arunachal Pradesh and its Tawang River Basin
Document Type
Conference
Source
IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium Geoscience and Remote Sensing Symposium, IGARSS 2023 - 2023 IEEE International. :110-113 Jul, 2023
Subject
Language
ISSN
2153-7003
Abstract
The eco-hydrology of the Himalayan catchments depends on their glacial and snow coverages as well as associated dynamics. These components of the Himalayan cryosphere can be seen as tracers of climate variability. In this study, MOD10A2 products have been used along with Landsat-5/8 datasets to capture the spatiotemporal fluctuations in the intra-annual snow cover of Arunachal Pradesh and its Tawang basin. Snow cover has been mapped for the past 21 years 2000-2021, for both the ablation and accumulation period using MOD10A2 products and normalized difference snow index (NDSI) (threshold: 0.4). The accumulation and ablation period snow cover shows decreasing and increasing trend respectively for the entire Arunachal Pradesh. However, for the Tawang basin, the accumulation and ablation period snow cover trend seems to be stable at 450 Km 2 and 100 Km 2 ,, respectively. The contaminated snow cover of the Tawang region on 16 February 2022 (Landsat-8) has been identified as 564.42 Km 2 (53.7%). ALOS PALSAR digital elevation model (DEM) has been used to identify glacial lakes (slope