Results 31 to 40 of about 1,037,697 (313)

Improving current methodology for mapping the index of potential alteration of water quality for the Colombian National Water Study

, 2022
In Colombia, the Institute of Hydrology, Meteorology and Environmental Studies (IDEAM) publishes a quadrennial report called the National Water Study (ENA).
Cancino Acevedo, Johan Daniel
core   +1 more source

An Automated Method for Extracting Rivers and Lakes from Landsat Imagery

Remote Sensing, 2014
The water index (WI) is designed to highlight inland water bodies in remotely sensed imagery. The application of WI for water body mapping is mainly based on the thresholding method.
Hao Jiang, Min Feng, Yunqiang Zhu, Ning Lu, Jianxi Huang, Tong Xiao   +5 more
doaj   +1 more source

Dıscrete-tıme dynamıc water qualıty ındex model ın coastal water [PDF]

Global Journal of Environmental Science and Management, 2021
BACKGROUND AND OBJECTIVES: It is important to develop dynamic water quality index software that reflected accurately the state of enclosed coastal water quality.
H. Hapoğlu, Ş. Camcıoğlu, B. Özyurt, P. Yildirim, L. Balas   +4 more
doaj   +1 more source

Analisis Water Supply-Demand Index Assessment untuk Produksi Padi Berkelanjutan di Daerah Aliran Sungai (DAS) Serayu Hilir, Provinsi Jawa Tengah, Indonesia

Jurnal Keteknikan Pertanian Tropis dan Biosistem
Sumber daya air merupakan elemen penting dalam proses produksi padi khususnya di wilayah tropis seperti Indonesia. Penelitian ini bertujuan untuk menganalisis water supply demand index (WSDI) untuk mendukung produksi padi di Daerah Aliran Sungai (DAS ...
M. Yusfan Yuzanni, Chandra Setyawan, Sahid Susanto   +2 more
doaj   +1 more source

Comparing Water Indices for Landsat Data for Automated Surface Water Body Extraction under Complex Ground Background: A Case Study in Jilin Province

Remote Sensing, 2023
Derived from Landsat imagery and capable of enhancing the contrast between surface water bodies and the background, water indices are widely used in surface water body extraction. Whether one index and its optimal threshold can maintain the best all year
Shu Liu, Yanfeng Wu, Guangxin Zhang, Nan Lin, Zihao Liu   +4 more
doaj   +1 more source

Application of a revised Water Poverty Index to target the water poor [PDF]

Water Science and Technology, 2011
The Water Poverty Index (WPI) has been recognized as a useful tool in policy analysis. The index integrates various physical, social and environmental aspects to enable more holistic assessment of water resources. However, soundness of this tool relies on two complementary aspects: (i) inadequate techniques employed in index construction would produce ...
Giné Garriga, Ricard, Pérez Foguet, Agustí   +1 more
openaire   +4 more sources

An index-based approach to assess the water availability for irrigated agriculture in sub-Saharan Africa [PDF]

, 2018
Agriculture is a major economic sector in sub-Saharan African (SSA) countries, where it contributes 32 percent of the gross domestic product (GDP) and employs 65 percent of the population.
Abou Zaki, N. (Nizar), Stefanos Xenarios, Kløve, B. (Bjørn), Rossi, P. M. (Pekka M.), Kløve, Bjørn, Pekka M. Rossi, Rossi, Pekka M., Ali Torabi Haghighi, Xenarios, Stefanos, Haghighi, Ali Torabi, Xenarios, S. (Stefanos), Zaki, Nizar Abou, Torabi Haghighi, A. (Ali), Torabi Haghighi, Ali, Bjørn Kløve, Nizar Abou Zaki, Abou Zaki, Nizar   +16 more
core   +1 more source

Mapping Phytoplankton and Algal Blooms With a Novel Multisensor Water Index

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Multispectral satellite imageries (MSIs) are strong enough to delineate features of interest by suppressing others. The water index is a method applied to delineate the water features by combining the multispectral band images.
Vikash Kumar Mishra, Amit Kumar Mishra
doaj   +1 more source

Open-Surface River Extraction Based on Sentinel-2 MSI Imagery and DEM Data: Case Study of the Upper Yellow River

Remote Sensing, 2020
Water is essential for the survival of plants, animals, and human beings. It is imperative to effectively manage and protect aquatic resources to sustain life on Earth. Small tributaries are an important water resource originating in mountain areas, they
Dan Li, Baosheng Wu, Bowei Chen, Chao Qin, Yanjun Wang, Yi Zhang, Yuan Xue   +6 more
doaj   +1 more source

Dynamic monitoring of surface water areas of nine plateau lakes in Yunnan Province using long time-series Landsat imagery based on the Google Earth Engine platform

Geocarto International, 2023
Lakes are sensitive to both climate change and human activities, especially in the Yungui Plateau zone. As the main supply of water sources, surface water has a significant impact on environment, ecological balance and socioeconomic development. However,
Lichen Lu, Huiling Sun
doaj   +1 more source