SATELLITE OBSERVATIONS REVEAL MORPHOLOGICAL CHANGES IN ASIAN DELTAS FROM 1986 TO 2018
نویسندگان
چکیده
Abstract. Asian deltas are densely populated and richly bio-diversified regions with significant social, economic, ecological environmental importance across the globe. These low-lying fertile floodplains support substantial food production. Because of sediment supply reductions, sea-level rising, subsidence, frequent storm surges, many rapidly sinking shrinking, which will threaten survival millions populations. It’s great significance to monitor delta morphological evolution understand relationship between their shoreline migrations supplies. However, quantifying changes is challenging due its nature high dynamics. In this study, we developed a methodology integrated by time-series algorithm water frequency spatial analysis track 11 major from 1986 2018.The results show that Yellow, Yangtze, Pearl, Red, Mekong, Ganges-Brahmaputra, Chao Phraya have experienced net land gain at total 1829.3 km2, China’s three accounting for 73 percent all. The Mahanadi, Irrawaddy, Indus, Godavari-Krishna undergone loss 295.1 Indus River Delta accounted 65 percent. Most shorelines in Yangtze were constantly advancing seaward rate over 30 m/year, whereas, ones rest significantly being eroded 20 m/year. morphology closely related supplies management policies. also suggest rational wetland reclamation auxiliary projects restoration can enhance deltaic ability sustainable development.
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ژورنال
عنوان ژورنال: ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
سال: 2022
ISSN: ['2194-9042', '2194-9050', '2196-6346']
DOI: https://doi.org/10.5194/isprs-annals-v-3-2022-375-2022