Results 21 to 30 of about 1,769 (150)

Performances Evaluation of Water Body Extraction Techniques Using Landsat ETM+ Data: Case- Study of Lake Nubia, Sudan [PDF]

The Egyptian International Journal of Engineering Sciences and Technology, 2016
Lake Nubia (LN) is the Sudanese portion of Aswan High Dam Lake (AHDL). Thispaper aims to detect the better technique for extraction of the water surface of LN.Eight techniques are tested using Landsat ETM+ image and their performances inextracting the ...
K Ali, A Negmb, M Elsahabi
doaj   +1 more source

Lake Water Quality and Dynamics Assessment during 1990–2020 (A Case Study: Chao Lake, China)

Atmosphere, 2023
Settlements along the coastlines of oceans and lakes, which are among the world’s most densely populated areas, are in immediate danger due to stressors brought on by climate change and dangers posed by human activities. This study investigates the water
Chuan Li, Iman Rousta, Haraldur Olafsson, Hao Zhang   +3 more
doaj   +1 more source

Seasonality of Biophysical Parameters in Extreme Years of Precipitation in Pernambuco: Relations, Regionalities, and Variability

Atmosphere, 2023
This study analyzed the seasonality of biophysical parameters in the extreme years of precipitation and the relationship with the monthly precipitation of the state of Pernambuco at the regional level (Pernambuco) and homogeneous precipitation zones ...
Alan Cézar Bezerra, Jhon Lennon Bezerra da Silva, Douglas Alberto de Oliveira Silva, Cristina Rodrigues Nascimento, Eberson Pessoa Ribeiro, Josiclêda Domiciano Galvincio, Marcos Vinícius da Silva, Henrique Fonseca Elias de Oliveira, Márcio Mesquita, José Francisco de Oliveira-Júnior, Alexsandro Claudio dos Santos Almeida, Pabrício Marcos Oliveira Lopes, Geber Barbosa de Albuquerque Moura   +12 more
doaj   +1 more source

Water Feature Extraction and Change Detection Using Multitemporal Landsat Imagery

Remote Sensing, 2014
Lake Urmia is the 20th largest lake and the second largest hyper saline lake (before September 2010) in the world. It is also the largest inland body of salt water in the Middle East.
Komeil Rokni, Anuar Ahmad, Ali Selamat, Sharifeh Hazini   +3 more
doaj   +1 more source

Evaluating spectral indices for water bodies extraction in western Tibetan Plateau

Egyptian Journal of Remote Sensing and Space Sciences, 2021
Waterbody extraction in the high-elevated region of the Tibetan Plateau from remote sensing imagery is an efficient way to investigate and monitor water resources.
Hafiza Wajiha Khalid, Rao M. Zahid Khalil, Muhammad Ateeq Qureshi   +2 more
doaj   +1 more source

Assessment Land Cover Change Using Normalized Difference Water Index (NDWI) In Bakun Reservoir, Sarawak

Journal of Engineering and Science Research, 2021
The location of Sarawak State in the equatorial region makes it an area of high rainfall. For this reason, hydroelectric power plants have been built in several catchments in Sarawak, especially in the Kapit area. This needs to be harnessed to improve the economy and social living standards of the people of Sarawak in particular.
openaire   +1 more source

Dynamic Characteristics of Canopy and Vegetation Water Content during an Entire Maize Growing Season in Relation to Spectral-Based Indices

Remote Sensing, 2022
A variety of spectral vegetation indices (SVIs) have been constructed to monitor crop water stress. However, their abilities to reflect dynamic canopy water content (CWC) and vegetation water content (VWC) during the growing season have not been ...
Huailin Zhou, Guangsheng Zhou, Xingyang Song, Qijin He   +3 more
doaj   +1 more source

Comparison of Normalized Difference Water Index (NDWI) and Sobel Filter Methods in Landsat 8 Imagery for Coastline Extraction

Jurnal Perikanan dan Kelautan, 2021
For a country, the existence of a coastline has an important value because it acts as a protection for marine resources and determines maritime boundaries between countries. There are various methods used for coastline analysis, both manual by digitizing and automatic by edge detection. This study compares the Normalized Difference Water Index (NDWI)
openaire   +2 more sources

Drought Monitoring With Spectral Indices Calculated From Modis Satellite Images In Hungary

Journal of Environmental Geography, 2015
In this study a new remote sensing drought index called Difference Drought Index (DDI) was introduced. DDI was calculated from the Terra satellite’s MODIS sensor surface reflectance data using visible red, near-infrared and short-wave-infrared spectral ...
Gulácsi András, Kovács Ferenc
doaj   +1 more source

IDENTIFICATION OF INUNDATED AREA USING NORMALIZED DIFFERENCE WATER INDEX (NDWI) ON LOWLAND REGION OF JAVA ISLAND

International Journal of Remote Sensing and Earth Sciences (IJReSES), 2014
Flood disaster is a major issues due to its frequently events on several areas in Indonesia. Delineation of inundated area caused by flood is needed to support disaster emergency response. The objective of this research was to identify inundated areas using NDWI methos from Landsat TM/ETM+ data on lowland regions of Java island.
- Suwarsono, Jalu Tejo Nugroho, - Wiweka
openaire   +2 more sources