نتایج جستجو برای: mndwi

تعداد نتایج: 147  

Journal: :Remote Sensing 2022

The annual flood and the alteration in hydrological regimes are most vital concerns Vietnamese Mekong Delta (VMD). Although synthetic aperture radar (SAR) Sentinel-1 imagery is widely used for water management, only a few studies have data mapping surface monitoring events VMD. This study developed an algorithm to implement (i) automatic Otsu threshold on series of images extract (ii) time anal...

Journal: :Ibis 2021

In several regions of the world, remoteness potential bird hotspots and lack trained observers have often prevented countries from effectively designing proper monitoring schemes at a national scale. For many countries, it is not known whether certain strongholds been missed that should be included for more complete censuses. Such gaps scales, sometimes large, may detrimental global schemes. To...

Journal: :Remote Sensing 2021

Mangroves play an important role in many aspects of ecosystem services. should be accurately extracted from remote sensing imagery to dynamically map and monitor the mangrove distribution area. However, popular extraction methods, such as object-oriented method, still have some defects for imagery, being low-intelligence, time-consuming, laborious. A pixel classification model inspired by deep ...

Journal: :ISPRS Int. J. Geo-Information 2017
Xia Wang Yaolin Liu Feng Ling Yanfang Liu Feiguo Fang

Ningbo City in Zhejiang Province is one of the largest port cities in China and has achieved high economic development during the past decades. The port construction, land reclamation, urban development and silt deposition in the Ningbo coastal zone have resulted in extensive coastline change. In this study, the spatio-temporal change of the Ningbo coastlines during 1976–2015 was detected and a...

Journal: :Indonesian Journal of Limnology 2021

Wetlands are vulnerable natural habitats that should be preserved to protect habitat for fish and wildlife, flood mitigation, improve water quality, recharge area, maintain surface flow during dry periods. Water bodies swamp areas two primary components of the wetland. Considering its essential roles ecosystem, Lake Sentarum was set as a national park area (Lake National Park – TNDS), Indonesia...

Journal: :Frontiers in Environmental Science 2021

With the increasing availability of big geospatial data (e.g., multi-spectral satellite imagery) and access to platforms that support multi-temporal analyses cloud-based computing, Geographical Information Systems, GIS), use remotely sensed information for monitoring riverine hydro-morpho-biodynamics is growing. Opportunities map, quantify detect changes in wider riverscape (i.e., water, sedime...

ژورنال: علوم آب و خاک 2019

In recent decades, land use changes have been one of the most important environmental issues worldwide. This study was carried out to investigate and analyse land use changes in dust sources of south and south-east Ahwaz and surrounding lands using remote sensing technique. Firstly, based on the standard precipitation index (SPI), the years 1986, 2002 and 2016 were selected as years with near n...

Wetlands are dynamic and complex aquatic ecosystems that play an important role in the survival of many plant and animal species. This study modeled the spatio-temporal changes of the Arak Meighan wetland during 1985–2020 using the multi-temporal Landsat images. In doing so, the applicability of different satellite-derived indexes including NDVI, NDWI, MNDWI, AWEIsh , AWEInsh , and WRI was inve...

Journal: :Frontiers in remote sensing 2021

Moderate to high resolution satellite imageries are commonly used in mapping mangrove cover from local global scales. In addition extent information, studies such as composition, ecology, and distribution analysis require further information on zonation. Mangrove zonation refers unique sections within a forest being dominated by similar family, genus, or species. This can be observed both natur...

Journal: :Journal of Hydrology 2022

Small water bodies and their temporal changes are, especially in urban areas, closely related to people’s daily life they have an impact on the living environment. For small mapping with optical remote sensing images, it is challenging establish a balance between reducing incorrect detection increasing integrity of extraction. time-series application, variability spectral information also for w...

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