hydrology Articles
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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 ...
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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 ...
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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 ...
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Snow Hydrology
Snow hydrology (hydrology, from Greek word Hydrologia, “study of water”)is a scientific study in the field of hydrology which focuses on the composition, dispersion, and movement of snow and ice.Studies within snow hydrology can be seen to predate the Anno Domini era, however major breakthroughs were not made until the mid eighteenth century. Snowfall, accumulation and melt are ...
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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 ...
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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 ...
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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 infiltration rates and via ...
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Book Review: Global Water Dynamics. Shallow and Deep Groundwater, Petroleum Hydrology, Hydrothermal Fluids, and Landscaping by Emanuel Mazor
Global Water Dynamics. Shallow and Deep Groundwater, Petroleum Hydrology, Hydrothermal Fluids, and Landscaping, by Emanuel Mazor. New York, Marcel Dekker, 2004. 393 pp. ISBN 0-8247-5322-4Keywords: book ...
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Snowmelt and its role in the hydrologic and nutrient budgets of prairie streams
Small watersheds in the Canadian Prairies are characterized by seasonally disconnected hydrologic networks whereby stream channels are hydrologically connected during snowmelt but have disconnected reaches throughout the remainder of the year. Snowmelt is the most significant hydrological event in the Canadian Prairies, yet few studies have investigated the role of snowmelt in the nutrient budget ...
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Response in the trophic state of stratified lakes to changes in hydrology and water level: potential effects of climate change
To determine how climate-induced changes in hydrology and water level may affect the trophic state (productivity) of stratified lakes, two relatively pristine dimictic temperate lakes in Wisconsin, USA, were examined. Both are closed-basin lakes that experience changes in water level and degradation in water quality during periods of high water. One, a seepage lake with no inlets or outlets, has ...
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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 ...
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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 ...
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Streamflow and hydrogen ion interrelationships identified using data-based mechanistic modelling of high frequency observations through contiguous storms
With the aim of quantifying the purely hydrological control on fast water quality dynamics, a modelling approach was used to identify the structure (and dynamic response characteristics or DRCs) of the relationship between rainfall and hydrogen ion (H+) load, with reference to rainfall to streamflow response. Unlike most hydrochemistry studies, the method used makes no a priori ...
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Statistical attribution analysis of the nonstationarity of the annual runoff series of the Weihe River
Time-varying moments models based on Pearson Type III and normal distributions respectively are built under the generalized additive model in location, scale and shape (GAMLSS) framework to analyze the nonstationarity of the annual runoff series of the Weihe River, the largest tributary of the Yellow River. The detection of nonstationarities in hydrological time series (annual runoff, ...
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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 ...
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Temporal and spatial variation of water level in urbanizing plain river network region
As one of the most developed regions in China, the plain of East China is undergoing gradually increased flooding under the obvious urbanization process. This paper mainly analyses the trend of water level time series in the region during the past decades, and assesses the temporal and spatial variation of water level and indicators of hydrological alteration. The results show that there is a ...
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Modelling provenance in hydrologic science: a case study on streamflow forecasting
The web, and more recently the concept and technology of the Semantic Web, has created a wealth of new ideas and innovative tools for data management, integration and computation in an open framework and at a very large scale. One area of particular interest to the science of hydrology is the capture, representation, inference and presentation of provenance information: information that helps ...
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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 ...
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Intelligent manipulation and calibration of parameters for hydrological models
It would be greatly helpful to neophytes if knowledge-based system technology incorporating the existing heuristic knowledge about model manipulation can be integrated into the hydrological system. This paper delineates the development and implementation of a prototype knowledge-based system for model manipulation for hydrological processes by employing an expert system shell. The architecture ...
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