Future climate or land use? Attribution of changes in surface runoff in a typical Sahelian landscape

Comptes Rendus Géoscience, Год журнала: 2023, Номер 355(S1), С. 411 - 438

Опубликована: Янв. 12, 2023

In this study, the Soil and Water Assessment Tool (SWAT) model is used to assess changes in surface runoff between baseline (1995–2014) future (2031–2050) periods Tougou watershed (37km 2 ) Burkina Faso. The study uses a combination of land use maps (for current periods) bias-corrected ensemble 9 CMIP6 climate models, under two warming scenarios. An increase rainfall (13.7% 18.8%) projected, which major contributor (24.2% 34.3%). change narrative (i.e. conversion bare areas croplands) expected decrease runoff, albeit minor comparison effect change. Similar findings are observed for annual maximum runoff. This sheds light on need consider simultaneously framing water management policies. Dans cette étude, le modèle agro-éco-hydrologique SWAT est utilisé pour évaluer les changements dans l’écoulement de entre la période référence 1995–2014 et 2031–2050 sur bassin versant au Cette étude utilise une combinaison cartes d’états (pour actuelle future) un corrigé modèles climatiques issus des simulations CMIP6, sous deux scénarios réchauffement. Une augmentation précipitations (de 13,7 % à 18,8 %) prévue, ce qui principal facteur contribuant l’augmentation écoulements (24,2 34,3 %). Les projetés états (principalement surfaces dégradées en sols cultivés) devrait entraîner diminution surface, toutefois proportions plus faibles comparaison effets du climat futur. Des résultats similaires sont observés lécoulement maximal annuel. met lumière nécessité prendre compte simultanément futur l’élaboration politiques futures gestion l’eau.

---

Trends, sensitivity and estimation of daily reference evapotranspiration ET0 using limited climate data: regional focus on Burkina Faso in the West African Sahel

Theoretical and Applied Climatology, Год журнала: 2023, Номер 153(1-2), С. 947 - 974

Опубликована: Июнь 10, 2023

Язык: Английский

---

The impact of LUCC on the spatial pattern of ecological network during urbanization: A case study of Jinan City

Ecological Indicators, Год журнала: 2023, Номер 155, С. 111004 - 111004

Опубликована: Сен. 30, 2023

Urbanization, driven by rapid economic growth, has resulted in dramatic land use/cover change (LUCC), posing substantial risks to urban ecological security. While constructing networks is a productive strategy for achieving balance between protection and urbanization, the limited research conducted on impacts of LUCC spatial patterns during urbanization poses hindrance scientific construction networks. Therefore, this study focuses Jinan City, an important city situated downstream region Yellow River Basin, China. The utilized simulation approaches, including MSPA, MCR, InVEST model gravity model, investigate analyze City from 2000 2020. A set capturing changes network elements was proposed explore evolutionary characteristics pattern Finally, Geodetector impact mechanism findings indicate that: (1) During last two decades, development witnessed expansion approximately 588.83 km2, proportion also increased, but overall structure distribution are not balanced. (2) Despite areas, escalation resistance significant degradation functional capacity corridors, with decrease 8.37 % number primary corridors. reduced connectivity impeded efficient cycling processes ecosystems. (3) complex interactions cumulative effects led evolution transformation cropland into improved composition network, while encroachment disorderly internal types principal factors causing elements. (4) influenced coupling policies. However, there need government strengthen policy coordination optimize layout better manage conserve This holds potential offer valuable insights references guiding planning, protection, formulation sustainable policies throughout process.

Язык: Английский

---

Impacts of land use/land cover and climate change on hydrological cycle in the Xiaoxingkai Lake Basin

Journal of Hydrology Regional Studies, Год журнала: 2023, Номер 47, С. 101422 - 101422

Опубликована: Май 17, 2023

The Xiaoxingkai Lake Basin in China. Watershed hydrological simulation is a prominent aspect of hydrology, however, comprehensive analysis lake basins based on rarely conducted. Therefore, we used the Soil and Water Assessment Tool (SWAT+) with dynamic land use/land cover (LULC) input time-varying parameters to simulate streamflow estimate impacts LULC climate change during 1961–2017. We also evaluated contributions water volume through balance analysis. simulated agrees well observations at most stations (Nash-Sutcliffe Efficiency, NSE > 0.5, goodness fit, R2 0.8). Climate has positive effect which dominates variations 1981–1995 2006–2017, whereas negative dominant role 1996–2005. increased slightly rate 0.12 × 106 m3 yr−1, contributing (77.25 %) increase, followed by direct human activities (47.50 (−24.76 %). This study facilitates better understanding cycle under changing environments helpful for regional resource management.

Язык: Английский

---

From meteorological to hydrological drought: a case study using standardized indices in the Nakanbe River Basin, Burkina Faso

Natural Hazards, Год журнала: 2023, Номер 119(3), С. 1941 - 1965

Опубликована: Сен. 21, 2023

Язык: Английский

---

Assessing impacts of climate variability and land use/land cover change on the water balance components in the Sahel using Earth observations and hydrological modelling

Journal of Hydrology Regional Studies, Год журнала: 2023, Номер 47, С. 101370 - 101370

Опубликована: Апрель 7, 2023

Senegal river (SRB), Niger (NRB), and Lake Chad basins (LCB). We investigated the impacts of land use/land cover change (LULC) climate variability on water balance components from 1990 to 2020. applied Soil Water Assessment Tool (SWAT) coupled with remote sensing retrievals actual evapotranspiration (ETa) surface soil moisture (SSM). To separate two aforementioned factors, numerical experiments were designed: (i) effects by applying frozen LULC while changing climate; (ii) LULC. Overall, at basin level, results indicated that had dominant role in increasing groundwater recharge, runoff, return flow lateral LCB SRB. These increases triggered recovery lake area higher table increased SRB streamflow, scarcity NRB. In contrast, effect change, specifically natural vegetation expansion, ET decreased which could be a reason for depletion decreasing NRB streamflow. At sub-basin i.e. gain cropland urban areas expense forests some sub-basins NRB, led local increase runoff. This implies better redistribution downstream compensates deficit runoff caused expansion other catchments. changes, simultaneously high intensity long-duration precipitation, may likelihood inundation small catchments basin. outcomes give useful hydrological insights into management emphasizing crucial recycling.

Язык: Английский

---

Impacts of climate and land use/cover changes on the sustainability of irrigation water in West Africa: a systematic review

All Earth, Год журнала: 2024, Номер 36(1), С. 1 - 13

Опубликована: Янв. 31, 2024

Climate and LULC changes have a great influence on the hydrological processes which include evapotranspiration, infiltration, surface runoff, groundwater flow, stream discharge regime. This study aims to review existing literature impacts of climate, sustainability irrigation water in West Africa. The future Africa will be driven by strong external factors, such as rapid population growth, climate change, change. annual average temperature is between 25.9 34°C. Rising temperatures affected all sectors, including resources, increased demand, agricultural production. Reduction precipitation reduce river flows increase evaporation due drier atmosphere, thereby reducing amount available reservoirs for irrigation. current demand freshwater purposes expected triple 2050. From 1997 2018, forest area decreased 24.6%, while residential land areas 140% 11.7%, respectively, Effective mitigation adaptation measures are policy issue observed adverse availability

Язык: Английский

---

Impacts of climate and environmental changes on water resources: A multi-scale study based on Nakanbé nested watersheds in West African Sahel

Journal of Hydrology Regional Studies, Год журнала: 2021, Номер 35, С. 100828 - 100828

Опубликована: Май 10, 2021

Nakanbé River watershed in the West Africa Sahel (WAS). This study aims to better understand hydrological behavior of WAS watersheds, which experienced Sahelian paradoxes (SHP). Budyko framework was employed evaluate impact climate change, environmental change and climate-environment interaction on surface runoff seven nested watersheds (38 – 21,178 km2) over period 1965–2018. Based time-series stationarity statistical tests, divided into one baseline (1965–1977) three impacted periods (1978−1994, 1995−2006 2007−2018). Compared period, 1978−1994 characterized by a decrease precipitation an increase (first SHP). During 1995–2018, coefficient, increased despite observed re-greening, interpreted as evidence second SHP. The showed that main driver first SHP (contribution reached +175 %), then became increasingly dominant during reaching +68 %). evolution Fu Budyko-type model parameter appears be good indicator soil water holding capacity spatio-temporal variability. Our results highlight consequences changes context might help developing informed land management restoration strategies control coefficients.

Язык: Английский

---

Modelling past and future land use and land cover dynamics in the Nakambe River Basin, West Africa

Modeling Earth Systems and Environment, Год журнала: 2022, Номер 9(2), С. 1651 - 1667

Опубликована: Окт. 31, 2022

Язык: Английский

---

Identifying the Multi-Scale Influences of Climate Factors on Runoff Changes in a Typical Karst Watershed Using Wavelet Analysis

Land, Год журнала: 2022, Номер 11(8), С. 1284 - 1284

Опубликована: Авг. 10, 2022

Identifying the impacts of climatic factors on runoff change has become a central topic in climate and hydrology research. This issue, however, received minimal attention karst watersheds worldwide. Multi-resolution analysis (MRA), continuous wavelet transform (CWT), cross (XWT) coherence (WTC) are used to study teleconnection time frequency between hydrological processes typical watershed at different scales. The main results are: (1) All exhibit cycle 12-month scales with changes, but periodic bandwidth rainfall changes is much wider than that temperature evaporation, indicating factor affecting changes. (2) In other cycles, impact interlacing phenomena positive negative, evaporation mainly negative. (3) response high-energy region low-energy significant-correlation shown correlation smaller phase angle, it slightly lagged 16-month Moreover, lags behind for 1–2 months those regions. (4) It been found there strong effect over runoff, lesser runoff. sheds light teleconnections rainfall, evapotranspiration surface which turn might help attain better management water resources watersheds.

Язык: Английский

---