نتایج جستجو برای: mndwi
تعداد نتایج: 147 فیلتر نتایج به سال:
Urban growth-related changes in land use and cover have segmented urban areas into zones of distinct surface air temperatures (i.e., Local Climate Zones—LCZ). While studies revealed inter-LCZ temperature variations, understanding controls variations Land Surface Temperature (LST) within LCZs has largely remained uninvestigated. In view the need for LCZ-specific heat mitigation strategies, this ...
Surface water/ice dynamic monitoring is crucial for many purposes, such as water resource management, agriculture, climate change, drought, and flood forecasting. New advances in remote sensing satellite data have made it possible to monitor the surface dynamics both spatially temporally. However, there are challenges when using these data, availability of valid imagery, cloud contamination iss...
در مقاله حاضر بهبررسی و مقایسه نتایج حاصل از استخراج پهنههای مرطوب و آبی جنوب دریاچه ارومیه با استفاده از تصاویر خام و تصحیح جوی شده ماهواره سنتینل 2 پرداخته شده است. بدینمنظور تصویر ماهواره سنتینل 2 مربوط به بهار سال 2019 دریافت شد. با توجه به اینکه هدف مقایسه اثر تصحیحات جوی روی تصاویر است، تصویر مورد نظر با استفاده از روش تفریق شیء تیره در قالب نرمافزار QGIS تصحیح شد. سپس بهمنظور استخر...
This paper proposes a technique to extract urban built-up land features from Landsat Thematic Mapper (TM) and Enhanced Thematic Mapper Plus (ETM ) imagery taking two cities in southeastern China as examples. The study selected three indices, Normalized Difference Built-up Index (NDBI), Modified Normalized Difference Water Index (MNDWI), and Soil Adjusted Vegetation Index (SAVI) to represent thr...
Urban heat islands are representative problems in urban environments. The impact of spectral indexes on land-surface temperature (LST) under different forms, climates, and functions is not fully understood. Local climate zones (LCZs) used to characterize heterogeneous cities. In this study, we quantified the contribution three cities high-temperature surface island intensity (SUHII) across LCZs...
Abstract. Flooding is one of the most prevalent natural disasters affecting people worldwide. a devastating disaster in Malaysia regarding number affected, socioeconomic damage, severity, and scale impact. Urban flooding currently major concern due to possible consequences frequency with which it occurs urban areas as urbanization population increase. Due paved surfaces, roads, high population,...
Abstract Lakshmibaur-Nalair Haor, a freshwater wetland ecosystem is situated in the north-eastern region of Bangladesh. This place hosts second largest swamp forest Containing rich biodiversity, this unique area experiences significant landscape changes. study examines land-use and land-cover (LULC) changes between 1989 2019 Haor by operating Landsat multispectral imageries through remote sensi...
Mapping surface water extent is important for managing supply agriculture and the environment. Remote sensing technologies, such as Landsat, provide an affordable means of capturing with reasonable spatial temporal coverage suited to this purpose. Many methods are available mapping including modified Normalised Difference Water Index (mNDWI), Fisher’s index (FWI), Observations from Space (WOfS)...
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