hydrology Articles

  • Delineation of homogeneous regions for streamflow via fuzzy c-means in the Amazon

    Lack of streamflow data is one of the main limitations in hydrologic studies. One method of solving this problem is by streamflow regionalization. The identification of hydrologically homogeneous regions is the main and most important stage of regionalization. In this study homogeneous flow regions are identified by fuzzy c-means (FCM) cluster analysis based on morpho-climatic characteristics ...


    By IWA Publishing

  • Role of hydrological and hydromorphological factors in ecological quality of medium-sized lowland streams

    The development of biological communities is an important research issue regarding biological quality elements. However, it is still uncertain how different organism groups and their metrics are affected by different environmental factors. A study of high-quality sites of medium-sized lowland streams typical for Latvia (ecoregion Baltic province) was carried out with an emphasis on hydrological ...


    By IWA Publishing

  • Système Hydrologique Europeén (SHE): review and perspectives after 30 years development in distributed physically-based hydrological modelling

    The European Hydrological System (or Système Hydrologique Europeén, SHE) was initiated as a collaborative venture in 1976 between the Danish Hydraulic Institute (Denmark), Institute of Hydrology (UK) and SOGREAH (France). The present paper reviews the development history of the SHE and discusses the practical and scientific difficulties encountered during the different stages of the development. ...


    By IWA Publishing

  • What we can learn from 2015/2016’s extreme flooding?

    November 2015 to early February 2016 was an incredibly challenging time for home and business owners in the UK. Throughout much of the country, particularly the North of England and West of Scotland, flooding caused millions of pounds of damage – and caused around 16,000 properties to be flooded in England in December alone. A new report by the Centre for Ecology & Hydrology (CEH) in ...


    By Aquaread Limited

  • Reconciling hydrology with engineering

    Hydrology has played an important role in the birth of science. Yet practical hydrological knowledge, related to human needs for water storage, transfer and management, existed before the development of natural philosophy and science. In contemporary times, hydrology has had strong links with engineering as its development has been related to the needs of the design and management of water ...


    By IWA Publishing

  • Aral Sea partial restoration. I. A Caspian water importation macroproject

    A comprehensive control strategy to partially recreate the Aral Sea involves several hydrological factors: overland pipeline conveyance of Caspian Sea water deposited into the Aral Sea Basin; overland pipeline conveyance of Aral Sea brine deposited into the Caspian Sea; compensating overland pipeline importation of Black Sea water to the Caspian Sea. Effects of hydrological management of the Syr ...


    By Inderscience Publishers

  • Extending HydroShare to enable hydrologic time series data as social media

    The Consortium of Universities for the Advancement of Hydrologic Science Inc. (CUAHSI) hydrologic information system (HIS) is a widely used service oriented system for time series data management. While this system is intended to empower the hydrologic sciences community with better data storage and distribution, it lacks support for the kind of ‘Web 2.0’ collaboration and social-networking ...


    By IWA Publishing

  • Hydrology with impact: how does hydrological science inform decision-makers?

    Water plays a central part in many aspects of life, and good hydrological science is needed to inform many decisions that affect human health and livelihoods. Hydrological scientists are aware of the importance of their work, and make great efforts to develop relevant research and advice. Decision-makers want to use the best science in their decisions, but rarely read academic papers or attend ...


    By IWA Publishing

  • Data quality assessment in hydrological information systems

    The hydrological data fed to hydrological decision support systems might be untimely, incomplete, inconsistent or illogical due to network congestion, low performance of servers, instrument failures, human errors, etc. It is imperative to assess, monitor and even control the quality of hydrological data residing in or acquired from each link of a hydrological data supply chain. However, the ...


    By IWA Publishing

  • A bivariate trend analysis to investigate the effect of increasing urbanisation on flood characteristics

    Flood frequency analyses are usually based on the assumption of stationarity, which might be unrealistic if changes in climate, land uses or urbanisation impact the study catchment. Moreover, most non-stationarity studies only focus on peak flows, ignoring other flood characteristics. In this study, the potential effect of increasing urbanisation on the bivariate relationship of peak flows and ...


    By IWA Publishing

  • Forecasting performance of support vector machine for the Poyang Lake's water level

    The growth of forecasting models has resulted in the development of an excellent model known as the support vector machine (SVM). SVMs can find a global optimal solution equipped with kernel functions. This research trains and tests the SVM network and constructs the support vector regression prediction model by using hydrologic data. Six hydrologic time series were calculated by different ...


    By IWA Publishing

  • The hydrological performance of bioretention cells in regions with cold climates: seasonal variation and implications for design

    Three bioretention cells in Norway were monitored for 23 to 36 months to evaluate the hydrological performance of bioretention cells operated in regions with cold climates and to test if cell size equations can be used to predict hydrological performance. Values of saturated hydraulic conductivity (Ksat) were determined for separate events by analyzing the observed ...


    By IWA Publishing

  • Identification of the impacts of climate changes and human activities on runoff in the upper and middle reaches of the Heihe River basin, China

    Detecting the effects of climate changes and human activities on river regimes would help to identify the original driving forces of hydrological disturbances and highlight the mechanisms of such hydrological processes under changing conditions. Two non-parametric tests (Mann-Kendall and Pettitt) were applied to detect the change point of runoff (1964–2006) in the upper and middle reaches of ...


    By IWA Publishing

  • The effect of hydrologic model development and calibration complexity on prediction accuracy

    Hydrologic modelling is central to the solution of many water quantity and quality issues. As the complexity of these issues increases, model complexity increases. The purpose of this research was to determine the effects of model complexity on hydrologic model prediction accuracy. Model complexity can enter through the formulation of the model structure as well as the selection of calibration ...


    By Inderscience Publishers

  • The Ganges water treaty: 20 years of cooperation, on India's terms

    International cooperation has become a universal mandate for governing transboundary waterbodies. Diverse stakeholders promote cooperation as a desirable, if not indispensable, approach from which to achieve sustainable and equitable benefits and for the creation of transboundary waterbodies. However, calls for international water cooperation operate from the presupposition that cooperation is ...


    By IWA Publishing

  • Long-term changes in hydrological regime of the lakes in Latvia

    Changes in the hydrological regime of the lakes of Latvia depend on natural and anthropogenic causes. This publication summarises the results of the research on the long-term changes in the water level, thermal and ice regimes in the seven largest lakes of Latvia: Liepājas, Usma, Ķīšezers, Burtnieks, Rāzna, Sventes and Lielais Ludzas, and their regional ...


    By IWA Publishing

  • ‘Here we have a system in which liquid water is moving; let's just get at the physics of it’ (Penman 1965)

    This paper is based on the 2012 Penman Lecture delivered at the 11th National Symposium of the British Hydrological Society. The title is taken from a 1965 interview by Howard Penman when hydrological modelling was just really starting. In the period since then, the idea that we might easily move towards ‘physically based’ representations of hydrological processes has proven ...


    By IWA Publishing

  • Prediction of hydrological time-series using extreme learning machine

    Applying feed-forward neural networks has been limited due to the use of conventional gradient-based slow learning algorithms in training and iterative determination of network parameters. This paper demonstrates a method that partly overcomes these problems by using an extreme learning machine (ELM) which predicts the hydrological time-series very quickly. ELMs, also called single-hidden ...


    By IWA Publishing

  • Water-related climate risks

    Future changes in the hydrological cycle may have important impacts on the society, e.g. with regard to flood risks, water availability and water quality. Although climate observations do not show consistent global trends in the hydrological cycle despite of the global warming in the past century, strong regional and seasonal changes are possible. Even if for some regions the mean hydrological ...


    By IWA Publishing

  • Hydrology vs sovereignty: managing the hydrological interdependency of international rivers

    In managing international rivers, governments are subject to two different boundaries. The socio-politically constructed boundaries governed by sovereignty and the physical boundaries imposed by the river's hydrology. The existence of a hydrological interdependency within an international basin means that “how” it is managed is important in constructing certainty in water supply. We compare two ...


    By IWA Publishing

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