Abstract. Hydrometric monitoring of small water bodies (1–10 ha) remains rare, due to their limited size and large numbers, preventing accurate assessments agricultural potential or cumulative influence in watershed hydrology. Landsat imagery has shown its support mapping bodies, but the surface areas, vegetation growth, rapid flood dynamics on long-term unquantified. A semi-automated method is developed here assess optimize multi-sensor time series monitor extent mean availability these...

Abstract Socio‐hydrology advanced the field of hydrology by considering humans and their activities as part water cycle, rather than external drivers. Models are used to infer reproducible trends in human interactions with resources. However, defining handling problems this way may restrict scope such modeling approaches. We propose an interdisciplinary socio‐hydrological approach overcome limit complement It starts from concrete field‐based situations, combines disciplinary well local...

Senegal River Basin in West Africa This paper aims to evaluate the sensitivity of global hydrological models potential evapotranspiration (PET) methods Basin. Potential is estimated using 21 and its influence on performance three GR (GR4J, GR5J GR6J) investigated five catchments. The data used are mean rainfall, discharge observed calculated PET over period 1984–1995. based climate those from NASA POWER reanalysis data. methodology consists in: (i) comparing consistency with respect PET,...

Water, food, energy, and the ecosystems they depend on interact with each other in highly complex interlinked ways. These interdependencies can be traced particularly well context of a river basin, which is delineated by hydrological boundaries. The interactions are shaped humans interacting nature, as such, basin characterized complex, coupled socioecological system. Niger River Basin West Africa such system, where water infrastructure development to meet growing water, energy demands may...

Understanding evapotranspiration and its long-term trends is essential for water cycle studies, modeling uses. Spatial temporal analysis of therefore important the management resources, particularly in context climate change. The objective this study to analyze trend reference (ET0) as well sensitivity climatic variables Senegal River basin. Mann-Kendall’s test Sen’s slope were used detect amplitude changes ET0 that most influence ET0. Results show a significant increase annual 32% watershed...

The increased open-access availability of radar and optical satellite imagery has engendered numerous land use cover (LULC) analyses combining these data sources. In parallel, cloud computing platforms have enabled a wider community to perform LULC classifications over long periods large areas. However, an assessment how the performance classifiers available on can be optimized for multi-imagery been lacking multi-temporal approaches. This study provides such supervised Google Earth Engine...

In the alluvial plains of large rivers, study flood dynamics is essential to appreciate water resource variations and preserve associated ecosystem services, in particular biodiversity, groundwater recharge flood-recession agriculture. Hydraulic modelling provides valuable opportunities simulate surface flows but are challenged by very flat topography sparse field observations, especially Africa. By combining advances earth observations (Digital Elevation Models Sentinel-2 areas), (stage,...

The Flow Regimes from International Experimental and Network Data (FRIEND-Water) is the oldest UNESCO Flagship Initiative within Intergovernmental Hydrological Programme (IHP).  Active since 1985, it seeks to facilitate, promote foster collaborations across borders between scientists (hydrologists related disciplines) conduct studies on shared river basins. programme has evolved over time focus four key themes relating (i) data collection sharing, (ii) impacts of global change...

In West Africa, hydrological variability remains poorly understood in many watersheds where observation networks are sparse. After gap-filling discharge time series through earth datasets and daily rainfall-runoff modeling, past future hydro-climatic the upper catchments of Gambia, Koliba-Corubal, Kayanga-Geba, Senegal rivers is investigated. CHIRPS rainfall GLEAM evapotranspiration global used to simulate runoff 38 sub-basins over 1981-2023 with GR4J model. Seven RCM models from...

Abstract Livelihoods in the Niger River basin rely mainly on rainfed agriculture, except dry extreme north. Low yields and water productivity result from low inputs, short growing seasons, spells, excessive water. The overlap of traditional modern rules impedes secure access to investments agriculture by generating uncertain land tenure. Improved management require technical, sociological, regulatory changes address wider causes poverty. Illiteracy poor quality, both correlated with high...

Accurate monitoring of surface water bodies is essential in numerous hydrological and agricultural applications. Combining imagery from multiple sensors can improve long-term monitoring; however, the benefits derived each sensor methods to automate mapping must be better understood across varying periods heterogeneous environments. All available observations Landsat 7, 8, Sentinel-2 MODIS over 1999–2019 are processed Google Earth Engines evaluate compare single multi-sensor approaches...

Senegal River Basin in West Africa. This work aimed to assess reference evapotranspiration (ET0) trends and its sensitivity climate variables on the period 2036–2065 basin. Seven General Circulation Models (GCMs) seven Regional Climate (RCMs) of CMIP5 project were used under scenarios RCP4.5 RCP8.5. The performance GCMs RCMs was first evaluated by comparing their outputs with reanalyses data. change ET0 is determined between periods 1971–2000 2036–2065. A coefficient calculated analyze...

Abstract. Reference evapotranspiration (ET0) is an essential parameter for hydrological modeling, irrigation planning and studying the impacts of climate change on water resources. The Penman–Monteith method recommended estimating ET0 under all climatic conditions, but its application limited in regions where data difficult to access. alternative use methods that incorporate fewer parameters. objective this work evaluate twenty using few parameters calibrate/validate best ones order adapt...

In recent years, accessing rainfall data from ground observation networks maintained by national meteorological services in West Africa has become increasingly challenging. This is primarily due to high acquisition costs and the often sparse distribution of gauges across region, which limits their use hydrological studies related research. At same time, rising availability precipitation products derived satellite/earth observations, reanalysis datasets, situ measurements presents exciting...

The Orbital Express Demonstration System (OEDS) flight test successfully demonstrated technologies required to autonomously service satellites on-orbit. mission's integrated robotics solution, the Manipulator (OEDMS) developed by MDA, performed critical operations. OEDMS comprised a six-jointed robotic manipulator arm and its avionics, non-proprietary servicing ORU (Orbital Replacement Unit) interfaces, vision control system for autonomous satellite capture, suite of Ground Segment Flight...

Abstract In this article the authors assess potential impacts of projected climate change on water, livelihoods and food security in Basin Focal Projet basins. The consider expected within context recently observed variability basins to better understand impact options available for adaptation. They use multi-global circulation model projections AR4 SRES A2a scenario, downscaled extracted each basin. find significant differences (both positive negative impacts) change, between basins, but...

Small reservoirs have developed across semi-arid areas as a low cost solution for millions of rural small holders to harvest scarce water resources. Studies highlighted limited agricultural use and availability on individual reservoirs, but no information exists the drought patterns multiple reservoirs. Their size dispersion prevents individualised hydrological monitoring, while modelling suffers from rainfall variability heterogeneity data sparse catchments A semi-automated original...

Flood recession farming practiced in flood-prone areas and on the banks of rivers lakes arid or semi-arid environments essentially depends soil water stock after flood has receded. During these last few decades, this coveted agriculture is increasingly challenged by severe constraints, due to increased hydrological hazards development projects aimed at controlling floods. These challenges are difficult anticipate, subject a great deal uncertainty regarding sustainability concerned areas. In...