ABSTRACT Evaluating localized impacts of water allocation scenarios (WASs) is an important multi-attribute water decision problem. The impacts of WASs are not the same across a basin, and may have their own spatial variations. Conventional multi-attribute decision-making (MADM) is not capable of capturing and implementing the spatial variations. Using these methods often results in simplification or

ABSTRACT Identifying situations where a hydrological model yields poor performance is useful for improving its predictive capability. Here we applied an evaluation methodology to diagnose the weaknesses of a parsimonious rainfall-runoff model for flood simulation. The GR5H-I hourly lumped model was evaluated over a large set of 229 French catchments and 2990 flood events. Model bias was calculated

ABSTRACT Sustainable urban water management initiatives are increasingly required to combat rapid urbanization and climate pressures. Initiatives include the role of tree planting, for which there is a need for strong evidence of benefits and drawbacks to support effective future planning. We report on the robustness of evidence from an assimilated database of urban hydrological impact studies which

ABSTRACT This paper investigates climate change impacts on the hydrology and water quality of Brazilian semi-arid reservoirs. An integrated approach coupling climate, hydrological and water quality models was proposed. Five general circulation models (GCMs) and two future scenarios (SSP2-4.5 and SSP5-8.5) were used for the projections. The simulations showed that uncertainty in climate forecast significantly

ABSTRACT A methodology using the standardised precipitation index is proposed to develop critical drought intensity-duration-frequency (IDF) curves. We define dry periods within which we recognise droughts of different durations. The most severe drought for each drought duration in each year is called the critical drought. The total probability theorem-coupled frequency analysis is used to determine

ABSTRACT We examine groundwater recharge processes and their relationship to rainfall intensity in the semi-arid, southwestern Lake Chad Basin of Nigeria using a newly compiled database of stable isotope data (δ2H, δ18O) from groundwater and rainfall. δ18O signatures in groundwater proximate to surface waters are enriched in 18O relative to regional rainfall and trace focused groundwater recharge from

ABSTRACT How well do traditional and analytical hydraulic geometry hypotheses predict discharge? We tested whether Dingman’s analytical expressions can be validated with field data by comparing it with the traditional Leopold-Maddock at-a-station hydraulic geometry (AHG). Data from a small basin (66 km2) in southern Brazil were used. The correlations for all the coefficients and for the exponents of

ABSTRACT The study aims to evaluate the long-term accuracy of global precipitation (Climate Prediction Center (CPC) and Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks – Climate Data Record (PERSIANN-CDR)) along with raingauge datasets at multiple temporal scales in the Vu Gia Thu Bon basin, Vietnam. Since there are few rainfall stations in this basin, it

Muskingum models are hydrological flood routing approach and vary only in the form of the storage relationship. The storage relationship was first established based on the weighted arithmetic mean. The weighted arithmetic averaging used in the classical linear Muskingum models is not the only way for expressing the storage in the river reach. This study proposes a generalized Muskingum model by establishing

ABSTRACT Socio-hydrology has become an important platform for discussion and exchange in current water research. A key challenge is the integration of the social into socio-hydrological logic. To date, most studies have excluded the potential outcomes of policy changes based on socio-hydrology models. The goal of this paper is to present a theoretical framework that extends the current debates in socio-hydrology

ABSTRACT The purpose of this study is to improve a simultaneous simulation of surface water and groundwater regimes with groundwater extraction to assess the implications for water management and propose primary solution approaches. The SWAT-MODFLOW model is performed for the Yom and Nan river basins during 2007–2016. The results demonstrate that the model provides an accurate depiction of the streamflow

ABSTRACT This study aims to compare hydrological processes in the Liptako-Gourma crystalline basement and the Iullemeden sedimentary zone in Western Niger. These two sites were equipped to quantify water infiltration, runoff and water retention within the beds of the ravines. We found that for the same surface type, while hydraulic conductivity was similar in both sites, surface runoff was 15–50% higher

ABSTRACT A variety of interdisciplinary fields have provided distinct and complementary perspectives on human-water systems over the past few decades. In that context, an important distinctive feature of sociohydrology is its historical and methodological link to ecohydrology. This linkage implies a compatibility between the two fields that can be leveraged to address important modeling challenges

Abstract Considering three sites under different climate conditions (arid, semiarid, and subhumid), this study aims to use the vadose-zone water stable isotope profiles to estimate the groundwater recharge rate. High-resolution vertical subsurface soil sampling along the vadose zone of the investigated sites was conducted. The collected samples were analysed to determine their stable isotopes ratios

Droughts are mainly caused by rainfall deficiencies and high evapotranspiration rates. This effort introduces “Factual Drought Index - FDI” as a composite index, based on precipitation and potential evapotranspiration (PET). Its innovation lies also in the fact that it does not consider the total PET, but only the amount of PET that exceeds or falls behind the corresponding average PET, for a certain

Abstract This study predicts future variations in simulated water balance components of Nam Co Lake under projected climate change scenarios using the soil and water assessment tool (SWAT) model in conjunction with the degree-day melt model (DDM) coupled with the glacier volume-area scaling law. We deduced that the water balance of Nam Co Lake will increase under all selected representative concentration

ABSTRACT This study investigated the impacts of climate and socio-economic changes on water resources in the Beas-Sutlej river basin, Himalaya. Multiple-model ensembles of five climate models forced with the Representative Concentration Pathway (RCP) 8.5 scenario and the Shared Socio-economic Pathway SSP 1 were used. A validated Water Evaluation And Planning (WEAP) model of the basin was used for assessing

ABSTRACT This paper discusses the gradual eclipse of a water management paradigm governed by the dominance of hydropower and irrigation-driven development. With the advent of new values, the former approach has given way to an acknowledgement of the value of water for its intangible contribution to the landscape, among other things. The European Water Framework Directive has lent further impetus to

ABSTRACT The city of Hamilton, Ontario, provides services to its residents through rigorous land-use planning and management. Policies, guidelines, manuals, plans, and specifications are the tools used for land-use planning. Goal Sustainable Development Goal (SDG) 11 of the Paris Agreement to combat climate change seeks to “Make cities and human settlements inclusive, safe, resilient and sustainable

ABSTRACT Predicting in ungauged basins (PUB) depends on the modelling uncertainties in the donor catchments (DCs). However, PUB is normally limited to a unique outcome, which may be quite uncertain, mainly in semi-arid basins where streamflow variability is high. Our goal is to assess the uncertainty in the parameter regionalization for streamflow prediction in semi-arid ungauged basins (UB). We used

ABSTRACT This work aims to study the water resource vulnerability in the Souss-Massa Region, Morocco. In our case 35 subdivisions were investigated for their water resource vulnerability. Based on an indicator approach and a participatory weighting method, 10 indicators and their weights were identified for the vulnerability assessment, reflecting three aspects: exposure, sensitivity and adaptive capacity

ABSTRACT This study generated a water yield dataset for Canada for 1979–2016 by subtracting the land surface evapotranspiration (ET) and water surface evaporation (E0) from precipitation (P). The dataset was validated in Budyko space and compared with streamflow (Q) before the spatial variability and trends were analysed. Results indicate (1) uncertainties of the dataset are generally small; (2) despite

ABSTRACT Societies can be better prepared to face hydrological extremes (e.g. flash floods) by understanding the trends and variability of rainfall aggressiveness and its derivative, erosivity density (ED). Estimating extended time series of ED is, however, scientifically challenging because of the paucity of long-term high-resolution pluviometric observations. This research presents the longest ED

ABSTRACT High-resolution modelling is needed to improve the understanding and management of storm water in cities. It requires data, which is not always available; hence the growing importance of handling missing data. Here, we use impervious areas in cities as case study. They are responsible for rapid runoff that can generate surface flooding. A methodology to handle such binary missing data relying

ABSTRACT Determination of hyporheic flow between surface water and groundwater is crucial to clarify the coupled water systems’ hydrological and ecological behaviour. Therefore, this study focuses on groundwater systems interacting with water bodies with sloping surfaces. A sloping stream is defined as an aquifer’s boundary condition. A recharge/discharge term is incorporated into the groundwater flow

ABSTRACT The high cost of monitoring suspended sediment concentration (SSC) in rivers calls for the development of indirect estimation methods, based on relationships with other variables, which are easier and cheaper to measure. We present an original approach to investigate the capacity of regional models to extrapolate SSC to ungauged basins, in a heterogeneous region with scarce in situ data and

ABSTRACT This study presents a comparison of several interception modelling approaches and their impact on the simulation of discharge, soil moisture content and groundwater level using the Hydrologiska Byråns Vattenbalansavdelning (HBV)-light model. The study was based on 10-year measurements of interception loss in a mature Norway spruce forest. The interception modelled by the subtraction of the

ABSTRACT Canopy interception (I) can be divided into three processes: evaporation during rainfall (IR), during storm break time (ISbt) and after cessation of rainfall. Those values were measured using plastic Christmas tree stands, and it was found that IR was much larger than ISbt. Although it is commonly accepted that wet canopy evaporation is a major process of I, if so, ISbt must be greater than

Abstract Overland flow occurs on a land surface, making a sheet flow without any flow concentration. Under these conditions, cultivated semiarid hillslopes experience interrill erosion. An objective of this study was to evaluate the hydraulic resistance caused by semiarid crops and shrubs in two slopes’ field conditions, and another was to know more about the overland flow governed by Froude number

Abstract When it comes to projecting the potential effects of climate change on hydro-climatic variables using time-series models, the conventional approach has been to examine correlations with exogenous variables. Establishing correlations among endogenous and exogenous variables, however, cannot guarantee that there is a cause-effect relationship among the variables. This study, therefore, used

Abstract The present study aims at exploring the potential of multi-scalar meteorological drought indices in detecting soil moisture drought events. The standardized soil moisture index(SSMI), standardized precipitation index(SPI), standardized evapo-transpiration index(SEI), standardized precipitation evapo-transpiration index(SPEI) and multi-variate moisture anomaly index(MMAI) were computed using

ABSTRACT Water stress prompts a durable reduction in water demand under some circumstances. This demand reduction has the potential to alter the benefits and costs of demand- and supply-side alternatives in water supply planning. This paper takes a socio-hydrological approach to assess the implications of this feedback, in the context of Las Vegas, Nevada. This application demonstrates feasibility

ABSTRACT Socio-hydrology has recently garnered attention as a promising research paradigm among hydrologists. In this paper, we argue that viewing the socio-hydrological systems as a network of causal factors can assist in these efforts by revealing emergent properties of socio-hydrological systems. These factors, which are neither actors nor affiliations but symbolic representations of miscellaneous

ABSTRACT The number of reservoirs worldwide increases annually, and there are growing concerns regarding their potential effects on runoff and baseflow. In this study, the impact of the recently constructed Chaersen Reservoir on downstream baseflow recession is analysed using the pre–post comparison method. Additionally, the potential causes of these effects are investigated. Reservoir construction

ABSTRACT In North Gujarat, local communities depend on the Precambrian basement aquifers for their primary source of water supply. The increasing demand for potable water puts stress on exploring for groundwater from less reliable sources of basement rocks. The main objective is to map groundwater potential zones (GWPZs) in water-scarce Precambrian terranes using integrated multi-criteria analysis

ABSTRACT Accurately quantifying transpiration (T) in apple orchards and its proportion of precipitation (P) is important for comprehending hydrological and ecological processes. A field experiment was conducted during the growing seasons (May to September) of 2013–2016 on the Loess Plateau of China to investigate the characteristics of T in apple (Malus domestica, cv. Fuji) orchards of different ages

ABSTRACT The aim of this paper is to compare some parameter estimation methods for the three-parameter kappa distribution, which is used in analysing precipitation, wind speed and streamflow data in hydrology. These methods include: method of L-moments (LM), maximum likelihood (ML), maximum product of spacings (MPS), location and scale parameters free maximum likelihood (LSPF), location parameter free

ABSTRACT This study describes the impacts of refinement of hydraulic geometry (HG) relationships in the hydrological MGB model applied to an Amazonian sub-basin (Purus River basin). To this end, HG relationships were developed for the entire basin and for hydrologically homogeneous regions, and their performances were compared with observed data and a global width and depth database. Two simulations

ABSTRACT Eddy covariance (EC) systems are expensive and not financially viable in a budget-restricted hydrological monitoring network. The surface renewal (SR) method is a cheaper alternative that requires a reduced fetch, but is currently dependent on EC for calibration. SR methods not requiring calibration (surface renewal 2 (SR2) and surface renewal dissipation theory (SRDT)) have been used but

ABSTRACT Climate change, together with changes in land cover and water allocations, is expected to affect the availability of water resources. The long-term effect of these changes on available water resources in central Chile was comprehensively evaluated through climatic trends from 1982, land cover changes from 2001, and water allocations from 1980. Trends in climatic, land cover and hydrological

ABSTRACT Predicting the impacts of projected change in precipitation (P) and temperature (T) on occurrence of drought and extreme events is essential for managing natural resources and setting policy. This study compares future occurrence of excessively dry and wet periods based on P, T, stream flow, soil moisture, and extreme P and T events. The comparisons are based on coupled future climate projections

ABSTRACT This study investigated the influence of land use change and climate change on changes in streamflow in the Bengawan Solo River (BSR, 16 389 km2) basin, Indonesia. We applied the excess water and energy approach to three tributaries of the BSR, namely Pidekso, Madiun and Kening rivers, which represent the up-, mid-, and downstream parts of the BSR, respectively. This study used hydrological

ABSTRACT The cause–effect relationship and rates of change of suspended sediment dynamics at catchment scales in the tropics remain poorly understood. This study used a chrono-sequence of remotely sensed land use and historical hydrometric data from 1985 to 2001 in three tropical streams of Mexico to analyse the temporal dynamics of land-use change and measured suspended sediment behaviour. The variations

ABSTRACT The study presents changes in the elements of the hydrological regime of Lake Hańcza in the period 1960–2019, including water temperature, ice cover characteristics and water level. It was determined that statistically significant changes resulted in an increase in water temperature (0.11°C·dec−1), a decrease in maximum ice thickness (5 cm·dec−1) and an increase in water levels (6.7 cm·dec−1)

To cope with the nonlinear and non-stationarity challenges faced by conventional runoff forecasting models and improve daily runoff prediction accuracy, a hybrid model based “feature decomposition-component prediction-result reconstruction” named VMD-LSTM-PSO was proposed. First, variational mode decomposition (VMD) was used to decompose the original daily runoff series into a discrete number of Intrinsic

Abstract Accurate prediction of dissolved oxygen (DO) concentration is important for managing healthy aquatic ecosystems. This study investigates the comparative potential of the Emotional Artificial Neural Network-Genetic Algorithm (EANN-GA), and three different ensemble techniques, i.e., Emotional Artificial Neural Network (EANN), Feed Forward Neural Network (FFNN), and Neural Network ensemble (NNE)

Uncertainties in climate change projection can originate from various sources and causing challenges. Thus, two specific approaches were developed in this study: in the selection of global climate models and assessment of drought occurrence. Considering the bias-corrected data, the performance of global climate models was evaluated using statistical methods, and 14 best-ranked-models were selected

ABSTRACT We developed a simple conceptual socio-hydrological model to explore the mutual interactions between water management systems and society. We examined the feedback among climate, population, wealth and water availability and capital investment. Given the focus on the interplay among these multiple variables, some simple schemes were designated in order to simulate rainfall inputs, surface

Abstract In the current paper, the efficiency of three new standalone data mining algorithms [e.g., M5P, Random Forest (RF), M5Rule (M5R)] and six novel hybrid algorithms of Bagging, BA (BA-M5P, BA-RF and BA-M5R) and Attribute Selected Classifier, ASC (ASC-M5P, ASC-RF and ASC-M5R) for streamflow prediction were assessed and compared with autoregressive integrated moving average (ARIMA) model as a benchmark

Quantification of the isotope altitude effect from precipitation allows to identify recharge altitudes in high-relief areas. However, steep terrains frequently limit the possibility of this precipitation-based approach. Perennial rivers often provide easy, year-round access for water sampling. However, in high-relief regions rivers may not adequately represent regional precipitation isotope patterns

Abstract This study evaluated the effectiveness of Climate Hazards Group InfraRed Precipitation with Station (CHIRPS) satellite rainfall data for the development of multi-step ahead streamflow forecasting models. Daily time scale precipitation data of nearly three decades (1986-2012) over the Varahi river basin in Western Ghats of Karnataka, India were used for the analysis. Machine learning (ML) models

ABSTRACT Water crises have risen over the past decade. In the Brazilian context, extreme events have intensified over the country, undermining water systems in regions that already face water shortages. Although previous studies have focussed on individual regions of Brazil, an overview of the entire country will contribute to developing a national action plan for mitigating water inequalities. Therefore

ABSTRACT Social and hydrological dynamics are coupled, nonlinear, and complex. To clarify and enhance our understanding of such dynamics, we developed a stylized model that combines hydrological and social dynamics of a generic coupled human–water system. In this model, neither too much water (flood) nor too little water (drought) is desirable, and the population self-organizes to respond to relative

ABSTRACT Equitable water allocation in the context of local-scale water conflicts can be challenging. We present a holistic framework for the analysis of small-scale water disputes, contributing an integrated approach to the analysis of water conflicts by providing technical solutions combined with an in-depth analysis of social dynamics. The analysis focuses on an ongoing water conflict in El Carracillo

ABSTRACT Seepage through an aquifer, the hydraulic conductivity of which varies vertically, is studied using the Dupuit-Forchheimer approximation (Girinskii’s potential) and numerically by FDM-MODFLOW and FEM-HYDRUS-2D. In urban water hydrology, the effect of compaction of the top stratum of an aquifer on the flow rate and the position of the water table (characterized by an integral quantity of the

ABSTRACT This paper outlines the importance of multiple time step optimization (MTO) in river basin allocation. The principal novelty of the work presented here is to provide a methodology for how to use MTO solutions in river basin planning and real-time operation. Two approaches for using the MTO results were tested on Damodar River basin in India and are presented in the paper. Using the proposed

ABSTRACT Magnitude frequency analysis of suspended sediment transport provides important information on the sediment transport characteristics of a river. Understanding the sediment transport characteristics of rivers plays a vital role in the management of water resource projects. The lower Drava River basin is one of the most extensively hydroelectrically exploited river basins in the world. In this

ABSTRACT The thermal regimes of lakes are important for understanding the functions and services of lake ecosystems. However, continuous lake temperature monitoring across the Tibetan Plateau is sparse, which inhibits verification of modeling results and also in-depth understanding of the lake thermal and mixing dynamics in this region. Here, we present the results of continuous temperature monitoring

ABSTRACT Groundwater is exploited extensively, continuously and in a disorderly way in the North China Plain (NCP), which leads to severe problems of groundwater over-exploitation, making it the largest groundwater funnel zone in the world. Based on a comprehensive treatment of over-exploited groundwater in Shandong province, this paper analyses and forecasts the water demand, supply and savings in

ABSTRACT In small catchments, the time interval most commonly used for simulation – daily or monthly – may not be sufficient to accurately capture the time distribution of hydrological processes. In this paper, the Soil and Water Assessment Tool (SWAT) was used to perform an hourly long-term streamflow and sediment load simulation in the small (4.8 km2) and forested Aixola catchment (northern Spain)