Propagation characteristics of meteorological drought to hydrological drought considering nonlinear correlations - A case study of the Hanjiang River Basin, China DOI Creative Commons
Hengli Wang, Zongzhi Wang, Ying Bai

et al.

Ecological Informatics, Journal Year: 2024, Volume and Issue: 80, P. 102512 - 102512

Published: Feb. 4, 2024

Meteorological drought serves as the precursor to hydrological drought. Clarifying propagation characteristics from meteorological is crucial for predicting and mitigating this severe natural disaster. In study, we proposed an assessment framework that integrates both linear nonlinear methods characterize transition in terms of response time, effective transformation rate, threshold. Utilizing ERA5 land reanalysis data (1951–2022) focusing on Hanjiang River Basin China, analyzed features with without inter-basin water diversion. Extracted event pairs indicate a more significant does not necessarily result drought, vice versa, which confirms The times derived using method are, average, two months shorter than those method. Inter-basin diversion will weaken correlation while strengthening correlation. When annual exceeds 12.0 billion m3, time experience sudden reduction. This research provides scientific reference basin-scale resource management mitigation practice.

Language: Английский

Drought propagation and its driving forces in central Asia under climate change DOI
Yanchao Zhu, Peng Yang, Jun Xia

et al.

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 636, P. 131260 - 131260

Published: April 28, 2024

Language: Английский

Citations

12
Compound ecological drought assessment of China using a Copula-based drought index DOI Creative Commons

Qianzuo Zhao,

Xuan Zhang, Chong Li

et al.

Ecological Indicators, Journal Year: 2024, Volume and Issue: 164, P. 112141 - 112141

Published: May 21, 2024

Meteorological droughts triggered by relative precipitation deficits would propagate through ecohydrological processes and result in comprehensive drought events terrestrial ecosystems. Drought indices indicating integrated information from perspective are essential for monitoring assessment. Considering processes, Copula modeling was utilized to develop an ecological index (ECDI) that included key elements as precipitation, actual evapotranspiration, soil moisture, gross primary production. Spatial temporal variations risk were assessed mainland China 2001 2022 based on the ECDI. The results showed (1) method suitable ECDI establishment. Over 90% of grids had RMSE values between estimated empirical joint distributions less than 0.1. (2) a reliable value 98.51%, 96.51%, 59.21% significant positive correlations with other respectively (standardized solar-induced chlorophyll fluorescence index, self-calibrated Palmer severity vegetation condition index). also satisfactory relevance consistency univariate each subregion (the correlation coefficients ranged 0.4 0.77, rates 47% 81%). (3) mitigation observed 77.94% (unused land excluded) last two decades, while intensification compound mainly located Qinghai–Tibet Plateau Southwest China. (4) composite assessment Northeast China, middle reach Yellow River Basin, Yangtze Basin hot spot areas high drought. It is expected could be indicator systems.

Language: Английский

Citations

12
Drought Spatial Extent and Dependence Increase During Drought Propagation From the Atmosphere to the Hydrosphere DOI Creative Commons
Manuela I. Brunner,

Corentin Chartier‐Rescan

Geophysical Research Letters, Journal Year: 2024, Volume and Issue: 51(6)

Published: March 22, 2024

Abstract As droughts propagate both in time and space, their impacts increase because of changes drought properties. Because temporal spatial propagation are mostly studied separately, it is yet unknown how extent connectedness change as though the hydrological cycle from precipitation to streamflow groundwater. Here, we use a large‐sample dataset 70 catchments Central Europe study local characteristics. We show that leads longer, later, fewer with larger extents. 75% P‐ET, among these 20% further 10% Of droughts, 40% Drought dependence during along pathway thanks synchronizing effects land‐surface but decreases again for groundwater sub‐surface heterogeneity.

Language: Английский

Citations

11
Three-dimensional perspective on the characterization of the spatiotemporal propagation from meteorological to agricultural drought DOI
Kai Feng, Yingying Wang, Yanbin Li

et al.

Agricultural and Forest Meteorology, Journal Year: 2024, Volume and Issue: 353, P. 110048 - 110048

Published: May 15, 2024

Language: Английский

Citations

11
Propagation characteristics of meteorological drought to hydrological drought considering nonlinear correlations - A case study of the Hanjiang River Basin, China DOI Creative Commons
Hengli Wang, Zongzhi Wang, Ying Bai

et al.

Ecological Informatics, Journal Year: 2024, Volume and Issue: 80, P. 102512 - 102512

Published: Feb. 4, 2024

Meteorological drought serves as the precursor to hydrological drought. Clarifying propagation characteristics from meteorological is crucial for predicting and mitigating this severe natural disaster. In study, we proposed an assessment framework that integrates both linear nonlinear methods characterize transition in terms of response time, effective transformation rate, threshold. Utilizing ERA5 land reanalysis data (1951–2022) focusing on Hanjiang River Basin China, analyzed features with without inter-basin water diversion. Extracted event pairs indicate a more significant does not necessarily result drought, vice versa, which confirms The times derived using method are, average, two months shorter than those method. Inter-basin diversion will weaken correlation while strengthening correlation. When annual exceeds 12.0 billion m3, time experience sudden reduction. This research provides scientific reference basin-scale resource management mitigation practice.

Language: Английский

Citations

9