Integrating the Budyko framework with the emerging hot spot analysis in local land use planning for regulating surface evapotranspiration ratio

• DOI: 10.1016/j.jenvman.2022.115232
• Publication Date: 2022-05-13T00:55:03Z
• Authors: Ping Yu Fan; Kwok Pan Chun; Ana Mijic; Mou Leong Tan; Omer Yetemen
• Keywords: Dryness; Land Cover; Potential evaporation

Land use planning regulates surface hydrological processes by adjusting land properties with varied evapotranspiration ratios. However, a dearth of empirical spatial information hampers the regulation place-specific processes. Therefore, this study proposed Local Use Planning framework for EvapoTranspiration Ratio regulations (ETR-LLUP), which was tested developments spatially-varied strategies in Dongjiang River Basin (DRB) Southern China. With first attempt at integrating Emerging Hot Spots Analysis (EHSA) Budyko framework, spatiotemporal trends ratios based on evaporative index and dryness index, from 1992 to 2018, were illustrated. Then, representative land-cover types each sub-basin defined using Geographically Weighted Principal Component Analysis, two wet years (1998 2016) three dry (2004, 2009, 2018), turn identified Standard Precipitation Index. Finally, Regressions (GWRs) used detect relationships between proportions both climates. Results showed that DRB consistently water-limited region situation getting worse. We also upper as hotspots management. Forests croplands experienced increasingly water stress compared other vegetation types. More importantly, results GWR models enabled us adjust basin 1) expanding contracting combination 'mosaic natural vegetation' 'broadleaved deciduous trees' western eastern parts basin, respectively; 2) increasing evergreen upstream basin. These ETR-LLUP allow management during