Benchmarking seasonal forecasting skill using river flow persistence in Irish catchments This study assesses the seasonal forecast skill of river flow persistence in 46 catchments representing a range of hydrogeological conditions across Ireland. Skill is evaluated against a climatology benchmark forecast and by examining correlations between predicted and observed flow anomalies. Forecasts perform

Abstract Groundwater resource overdraft is a serious water resource concern worldwide. Although afforestation has been recognized for conserving water resource, improving water quality and mitigating river flood, its role on groundwater resource is not fully investigated. Here we applied the US geological Survey’s MERAS (Mississippi Embayment Regional Aquifer Study) model to estimate impacts of afforestation

ABSTRACT Floods are natural and seasonal phenomena playing a crucial environmental role, but in constructed environments they bring many types of losses. This work analyses the stormwater management master plan (SWMP) in developed and developing cities. Using content analysis, three SWMPs were compared: Joinville – SC and Porto Alegre – RS, in Brazil, and the plan and Maia city, in Portugal. NVivo

ABSTRACT Over the past few decades, several naturalization methods have been developed for removing anthropogenic influences from streamflow time series, to the point that naturalized flows are often considered true natural flows in many studies. However, such trust in a particular naturalization method does not expose the assumptions underlying the method, nor does it quantifies the associated uncertainty

ABSTRACT Intermittent rivers are prevalent in many countries across Europe, but little is known about the temporal evolution of intermittence and its relationship with climate variability. Trend analysis of the annual and seasonal number of zero-flow days, the maximum duration of dry spells and the mean date of the zero-flow events is performed on a database of 452 rivers with varying degrees of intermittence

ABSTRACT Water temperature is fundamental to understand the functioning of aquatic systems. The objective of this study was to assess the effect of warm water discharge from a nuclear power plant on the water surface temperature (WST) of a reservoir. Using a 6-year Landsat-derived WST dataset, which includes 3 years of the power plant being in operation (2013–2015) and 3 years in which the power plant

ABSTRACT Most hydrological studies rely on a model calibrated using discharge alone. However, judging the model reliability based on such calibration is problematic, as it does not guarantee the correct representation of internal hydrological processes. This study aims (a) to develop a comprehensive multi-objective calibration framework using remote sensing vegetation data and hydrological signatures

ABSTRACT Understanding and monitoring extreme events is essential, particularly in river discharges from the La Plata Basin, where a large percentage of the economic resources and population of the region are concentrated. In this article, we seek to quantify the relationship between extreme events in discharge and the seasonal climatic index NIÑO 3.4. We start by estimating the phase shift between

ABSTRACT Satellite-based precipitation products provide critical precipitation sources with high resolution for hydrologic forecasting. This study aims to assess the suitability of the near-real-time “Early” run and “Late” run of the Integrated Multi-satellite Retrievals for the Global Precipitation Measurement (IMERG) products (IMERG-E and IMERG-L), and the post-real-time “Final” run IMERG product

ABSTRACT Stormwater, which cannot penetrate the soil surface due to the impermeable layer created by urbanization, inevitably causes floods. Therefore, the change in urban areas and calculation of flood size are of great importance in urban flood management. In this study, five basins are examined which have been experiencing floods caused by increasing urbanization in Bodrum, one of Turkey’s most

ABSTRACT Human settlements in the Sundarbans deltaic region of India have adopted a method of erecting embankments along the riverside to prevent river water from spilling over into the colonized areas. These embankments develop undercuts at the toe region that lead to failure from the swirling currents coupled with tidal surges and strong winds. To protect the embankment from erosion, the embankment

ABSTRACT The origin of groundwater and the processes controlling its chemical composition in complex coastal aquifers are of interest, as about 44% of the world’s population lives in coastal areas. Groundwater over-exploitation in the highly urbanized coastal regions has exerted pressure on these aquifers, leading to seawater intrusion. This study aimed to identify (1) the complex relationship between

ABSTRACT Reliable estimation of probable maximum precipitation (PMP) is critical to ensure the safety and resilience of communities. The aim of this study is to improve the estimation of 24-h PMP using ground-based and remotely sensed data, particularly over data-scarce regions. Gumbel copula, as a bivariate extreme value distribution based on a moisture maximization method, was applied to estimate

(2021). Correction. Hydrological Sciences Journal. Ahead of Print.

Abstract The farmers in the Bow River Basin (BRB), Canada, have adopted water conservation strategies to reduce water needs. This reduction, however, encouraged irrigation expansion, which may rebound agricultural water demands. This paradox requires an understanding of human adaptation to drought by mapping individual farmers’ water conservation decisions to the dynamics of the basin-wide water demand

Abstract Relationships between surface waters and groundwaters at basin scales are rarely investigated but have important implications for water resource development and management. Here, we integrate evidence from geochemical tracers and piezometry to advance understanding of regional-scale, groundwater-surface water interactions in the River Awash Basin of Ethiopia. Hydrological characteristics are

Abstract Bayesian hierarchical models have been increasingly used in regional flood frequency analysis due to their flexibility and ability for accommodating the spatial variability of flooding processes in distributions’ parameters. Hierarchical models based on the Generalized Extreme Value distribution (GEV) are useful since they may combine scaling properties and distinct degrees of pooling in the

The wise selection of modeling approaches with an appropriate level of complexity for the study objectives is critical for robust inference. In this paper, the structure of a cost-performance grid designed for flood modeling is presented. The grid is developed to compare different flood modeling approaches of variable complexity and to guide on the proper selection of the couple data-model. The methodology

Understanding how human and water systems co-evolve is a vital step towards achieving sustainability. This paper presents a historical socio-hydrological analysis of a semi-arid and overexploited basin in Eastern Iran, which is currently experiencing a serious water crisis. The co-evolutionary history of socio-hydrological system within the basin was divided into three phases of natural, expansion

ABSTRACT Disentangling the meteorological and human drivers of drought is a critical challenge. A key difficulty is identifying natural conditions against which human impacts can be analysed. Here, a combination of approaches is used: a hydrological model is developed for an upstream unmodified location and is then applied to a downstream site subject to irrigation-related abstractions: i.e. an up

ABSTRACT The climatic characteristics of Brazil present marked spatial and temporal precipitation contrasts, which are reviewed according to four main indexes: PRCPTOT – total precipitation; Rmm – number of days with precipitation; Rx1day – maximum 1-day precipitation; and SDII – simple precipitation intensity index. It was used data from 1975 to 2005 over 12 hydrographic basins. The seasonal distribution

ABSTRACT To explore and address complex water-related issues, true collaborative, interdisciplinary research at the interface of hydrology and social science is necessary. Accordingly, hydrologists are increasingly working with social sciences and becoming involved in fieldwork with participants. With the overarching aim of facilitating collaboration and interdisciplinary water research, here we discuss

Abstract A distributed hydrological model was applied to a 69km2 experimental catchment, Eddleston Water, Scotland, UK. The impact on model outputs of applying progressively simpler representations of spatial variability in land use and superficial geology was assessed. Alternative representations of the spatial distribution of superficial geology and land use produced differences in model outputs

Abstract Estimation of discharge hydrograph may be needed at river gaging stations where discharge is computed by converting water stage using a stage-discharge relation (a rating curve) or multiplying mean velocity with flow cross-sectional area. The mean velocity is computed by converting the measured maximum velocity to mean velocity using a conversion factor. Estimating the velocity conversion factor

Abstract The role of water quality, particularly its impact on health, environment, and wider well-being, are rarely acknowledged in the water–energy–food (WEF) nexus. Here we demonstrate the necessity for including water quality within the water dimension of the WEF nexus to address complex and multi-disciplinary challenges facing humanity. Firstly, we demonstrate the impact of water quality on the

ABSTRACT Groundwater has become an alternative water supply for various sectors of the population and the economy, and its extraction is increasing worldwide. The water poverty index (WPI) is a holistic tool that enables the establishment of links between poverty, social marginalization, environmental integrity, water availability and health. The index includes five components – water resources, access

ABSTRACT This study presents a procedure to determine improved curve numbers (CNImp) for application of the enhanced Soil Conservation Service - Curve Number (SCS-CN) model developed by Verma et al. for improved runoff prediction. To this end, five different mathematical relationships, i.e. linear, exponential, power, logarithmic and polynomial, are developed for 57 US Department of Agriculture – Agricultural

ABSTRACT Forecasting of irrigation demand is important for decision-making, and reference evapotranspiration (ETo) is a key determinant in evaluating water demand in advance. However, the precise determination of ETo is fairly difficult, and complex machine learning approaches are often used for this. This study, carried out in Veeranam tank, India, determines the multivariate analysis of correlated

ABSTRACT A new approach to select a model for fitting to a seasonal daily average rainfall semi-variogram was developed in this study by interpolating rainfall using geostatistical methods. Using two deterministic algorithms (Thiessen polygon, THI and inverse distance weighting, IDW) and two geostatistical algorithms (ordinary kriging, ORK and universal kriging, UNK) based on a rain gauge network,

ABSTRACT A new multi-step, hybrid artificial intelligence-based model is proposed to forecast future precipitation anomalies using relevant historical climate data coupled with large-scale climate oscillation features derived from the most relevant synoptic-scale climate mode indices. First, NSGA (non-dominated sorting genetic algorithm), as a feature selection strategy, is incorporated to search for

ABSTRACT This work presents a practical approach to reconstructing past and present discharge and water depth time series for operational monitoring of small-sized ungauged watersheds using remotely sensed and freely accessible datasets in conjunction with hydrological models. The methodology was applied to the Tsiribihina watershed in Madagascar. Mostly, satellite data are used, such as water levels

ABSTRACT Due to climate change and urban growth, the demand for new freshwater sources, especially groundwater, is increasing in water-deficient countries like Iran. Therefore, this study aimed at groundwater potential mapping (GPM) of the Nahavand Plain, Iran, using an optimized adaptive neuro fuzzy inference system (ANFIS) in a geographic information system, with three metaheuristic optimization

ABSTRACT The study assesses the variability and trends of both meteorological and hydrological droughts from 1970 to 2013 in Lake Malawi and Shire River basins using the standardized precipitation index (SPI) and standardized precipitation and evaporation index (SPEI) for meteorological droughts and the lake level change index (LLCI) for hydrological droughts. Trends and slopes in droughts and drought

ABSTRACT Chromium isotope and chemical compositions in runoff from two felsic rock catchments, the Lysina (LYS; Czech Republic) and the Neglinka (NEG; northwest Russia), were studied. Three types of water were identified: Na-Ca-SO4 type for the LYS, Mg-Ca-Cl-HCO3 type for the NEG downstream, and Mg-Ca-Cl to Mg-Ca-HCO3 type for the NEG upstream. The Cr (III) liberated during soil/bedrock weathering

ABSTRACT Three change-point methodologies were used to detect changes in the mean value of annual streamflow series and analyse simultaneous changes in large-scale global sea surface temperature (SST) oscillations. To verify the relationship between the variables we used wavelet coherence analysis. A preliminary detection skill test was performed using asynthetic series and Pruned Exact Linear Time

ABSTRACT Soil loss, erosion vulnerability and source contribution of sediments from the severely logged rainforest region of the Baram River basin, Borneo, were characterized for three periods over the past 25 years: 1991–1994 (T1), 2006–2007 (T2) and 2015 (T3). A geographical information system (GIS) was used to estimate the Revised Universal Soil Loss Equation (RUSLE) and sediment source determination

ABSTRACT High-accuracy flood susceptibility maps play a crucial role in flood vulnerability assessment and risk mitigation. This study assesses the potential application of three new ensemble models, which are integrations of the adaptive neuro-fuzzy inference system (ANFIS), analytic hierarchy process (AHP), certainty factor (CF) and weight of evidence (WoE). The experimental area is the Trotuș River

Abstract Arumeru district (northern Tanzania) has limited low-fluoride surface water sources for domestic use. Information on the alternative source, groundwater, is also limited in terms of occurrence and quality. Thus, resistivity data in conjunction with hydro-chemical data (fluoride, F−; total dissolved solids, TDS; and electrical conductivity, EC) and lithological logs were used to delineate groundwater

Abstract A new probabilistic conceptual model, named Assessment Model of Human Impact on Runoff Based on Stationarity Hypothesis (AMHIRBSH), was developed to attribute runoff variations to human activities through evaluating the changes in the runoff–runoff relationship (i.e. that between runoff in different sub-watersheds). The AMHIRBSH was then applied to the Baiyangdian drainage basin, North China

Abstract This study aims at analysing the effect of the Arctic Oscillation Index (AOI) on drought indices in northern Iraq. The Standardized Precipitation Evapotranspiration Index (SPEI) for 3-, 6- and 12-month timescales was calculated to determine the behaviour of the meteorological drought for the period 1983–2014. Average drought characteristics were found for three periods: 1983–1993, 1994–2004

Abstract This study presents a formula for estimating the mean flow velocity of the Nile River, Egypt. The proposed formula is presented in the form of the commonly used Manning equation. The derived relationship can be directly incorporated into numerical models and used by hydraulic professionals. The formula is developed using a large database of field measurements from the Nile River and its canals

Abstract Accurate modelling of peat water contents (θ) is critical for wetland studies. We modified the Campbell and Van Genuchten soil water retention curves (SWRC) by replacing their empirical parameters with measurable properties. Combining the water table depth (d WT) into SWRCs, we derived formulae for calculating volumetric θ from d WT, coded in a simple model to test our hypotheses that d WT

Abstract The main objective of this study is to detect scientific activities in the field of “water resources management” that include citizen science methods, using a bibliometric approach. The analysis aims at supporting the start of a new science shop based at the University of Brescia, Italy, in the framework of the European SciShops project. As the backdrop for science shops and community-based

Abstract Human settlement in Sundarbans deltaic region of India adopted a method of erecting embankments along the riverside to prevent the river water from spilling over to the colonised areas. These embankments develop undercut at toe region that lead to failure by the swirling currents coupled with tidal surges and strong winds. To protect the embankments from erosion, embankment face is covered

Abstract According to the simulations, permafrost area in the Tienshan Mountains has decreased about 1.73 × 104 km2 (or 20.91 %) from 1960s to 2000s, and the freeze state of seasonally frozen ground (SFG) exhibited the delaying freeze, advancing thaw, shortening freeze days and shallowing freeze depth. The river discharge has changed commonly, especially for winter and minimum monthly discharge. The

Abstract Hydrological methodologies are the most efficient approaches for environmental flow (eflow) assessments. This paper presents a hydrological methodology for determining eflows in rivers with scarce development to promote proactive environmental water allocations that limit flow alteration and unsustainable water use. The analysis includes the natural intra-annual and inter-annual ranges of

Abstract Widely available digital technologies are empowering citizens who are increasingly well informed and involved in numerous water, climate, and environmental challenges. Citizen science can serve many different purposes, from the “pleasure of doing science” to complementing observations, increasing scientific literacy, and supporting collaborative behaviour to solve specific water management

ABSTRACT Hydropower is essential for global electricity production, but it consumes water by evaporation from the reservoir surface. Here, a new approach is introduced in relation to modelling the water footprint of electricity (WFe) from hydropower. Two of the most important variables in calculating the WFe are volume of evaporation (EV) and electricity production (EP). In this study, the random forest

ABSTRACT This paper presents a hybrid approach for stormwater runoff modelling and pollutant load estimation in a hilly catchment. The stormwater runoff hydrograph was simulated by developing a conceptual hybrid model (HM) using transfer function. Model parameters were estimated by non-linear optimization. The simulated runoff hydrographs showed an excellent match with the observed data. Next, a relationship

ABSTRACT This study aims to understand the response of the trophic state index (TSI) of a reservoir under different watershed land-use scenarios. A novel methodology was applied to the Verde River Basin in the south of Brazil, which is exploited by agricultural activity and has a reservoir for water supply. An ecohydrological model was used to calculate daily nutrient concentrations in the water system

ABSTRACT The objective of this study is to quantify the seasonal and multi-annual variability and trends of low-flow river conditions in southeastern Poland. The study was performed using daily values of river discharge at 29 gauging stations for hydrological years 1976–2014. The results show regionally specific patterns, such that seasonality is high for the lowland rivers (low flows occur during

ABSTRACT With the developments of population and economy, it is necessary to assess the increasing impacts of human activities on evapotranspiration (ET) for sustainable water resources management. The discrepancies between the GRACE-based ET (ETGRACE) by water balance method and the simulated ET (ETVIP) using VIP-RS (Remote Sensing based Vegetation Interface Processes) model were applied to quantify

ABSTRACT Accurate streamflow prediction information is of great importance for water resource planning and management. The goal of this research is to develop a hybrid model for forecasting short-term runoff time series, where the variational mode decomposition (VMD) is first used to decompose the original nonlinear natural streamflow into numerous subcomponents with different frequencies and resolutions

ABSTRACT Predicting the effects of land-use (LU) changes and hydrological processes on a rapidly urbanized catchment using the Markov chain and WetSpa models is the main objective of this research. Hourly hydrometeorological data for 2001–2016, land use maps, a digital elevation model (DEM) and soil texture were used as inputs into the models. The simulation results verified some negative impacts of

ABSTRACT Saturated hydraulic conductivity (Ks ) is a key parameter in hydrology, although obtaining representative Ks values especially in natural watersheds is challenging due to its variability in space and time and the difficulties in field measurements. In this study, the challenges and limitations in characterizing the surface soil layer Ks in a Mediterranean natural watershed are presented, based

ABSTRACT Compared to spatial resolution, few studies have investigated the impacts of temporal rainfall resolution on hydrological modelling. Respectively using 9 years of daily and hourly rainfall data at 24 stations, we have established daily and hourly rainfall Soil and Water Assessment Tool (SWAT) models in a large-sized river basin in East Central China. Our results suggest that temporal rainfall

ABSTRACT As demonstrated by Indigenous and rural scholars, participatory research approaches can facilitate capacity building, promote data accessibility, and accomplish community goals within complex hydrosocial systems. To demonstrate challenges and opportunities for participatory research, we describe hydrosocial territories in a mining-impact region in northern Idaho. We then compare two community-university

ABSTRACT Household water treatment (HWT) can tackle the issue of consuming unsafe drinking water at home. While household socio-economic characteristics are often assumed to influence the psychology of HWT use, no study has rigorously tested such an assumption. We aim to fill the gap by a cross-sectional study in a rural area in Sumba Timur, Indonesia (N = 256). Using mediation analysis, we demonstrated

ABSTRACT Floods are the natural hazards that are causing the most deaths worldwide. Flood early warning systems are one of the most cost-efficient methods to reduce death rates, triggering decisions about the evacuation of exposed population. Although previous studies have investigated the effect of human behaviours on evacuation processes, studies analysing a combination of behaviours, flood onset

ABSTRACT This study compares single-site, multi-site and multi-variable SWAT calibration. The SWAT model was applied to a large basin (63 884 km2) and calibrated at a monthly time step with the SUFI-2 algorithm, using the Kling-Gupta efficiency (KGE) as the objective function. Multi-variable calibration was performed by combining streamflow and remote sensing-derived actual evapotranspiration data