Sustaining the Pearl River: A Critical Review of Changes in Fluvial Geomorphological Processes and the Driving Forces in the Pearl River Basin

Ou, Haidong; Cai, Shirong; Fan, Wei; Qiu, Junliang; Mu, Xiaolin; Zhou, Tao; Yang, Xiankun; Picco, Lorenzo

doi:10.3390/w16071001

Cited by 1 publication

(1 citation statement)

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“…reductions in cropland are observed to gradually weaken from developed regions to rural ones [53]. This study found that the decline in grassland primarily occurred in the northwestern PPRB, while the decrease in cropland was mainly observed in the central region as well as the coastal and Pearl River Delta areas, which is consistent with the findings of Ou et al [54]. Land management policies are also crucial driving forces for land use changes in the PPRB [55].…”

Section: Drivers Of Land Use Changesupporting

confidence: 90%

Land-Use/Cover Change and Driving Forces in the Pan-Pearl River Basin during the Period 1985–2020

Fan,

Yang,

Cai

et al. 2024

Land

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Land use/cover change (LUCC) is a vital aspect representing global change and humans’ impact on Earth’s surface. This study utilized the ESRI Land Cover 2020 and China Land Cover Dataset (CLCD), along with historical imagery from Google Earth, to develop a method for the assessment of land use data quality. Based on the assessment, the CLCD was updated to generate an improved Re-CLCD for the Pan-Pearl River Basin (PPRB) from 1985 to 2020, and to analyze LUCC in the PPRB over the past 35 years. The results indicate the following: (1) Among the seven land uses, built-up land experienced the most dramatic change, followed by cropland, forestland, grassland, shrubland, waterbody, and bare land, with notable increases in built-up land and forestland, and rapid decreases in cropland, grassland, and shrubland. (2) The magnitude of land use changed very widely, with the highest change in the Pearl River Delta, followed by small coastal river basins in southern Guangdong and western Guangxi, the Dongjiang River Basin, the Hanjiang River Basin, the Xijiang River Basin, the Beijiang River Basin, and lastly, Hainan Island. (3) The largest increase happened in built-up land, with a total increase of 12,184 km2, mainly due to the occupation of cropland and forestland, corresponding to the highest decrease in cropland, with a net loss of 10,435 km2, which was primarily converted to forestland and built-up land. The study results are valuable in providing a scientific basis for policy overhaul regarding land resources and management to safeguard ecological balance and promote sustainable development in the Pan-Pearl River Basin.

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Section: Drivers Of Land Use Changesupporting

confidence: 90%