river watershed Articles
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Development of a water quality assessment model: a water quality assessment model based on watershed characteristics by non-linear regression
Here, a water quality assessment model (WQAM) is developed by non-linear regression as an alternative to physical watershed modeling in South Korea. Three cases and 10 scenarios are applied and reviewed to determine the most appropriate WQAM. The three cases are: (1) the area size allocation of sub-watersheds, (2) the watershed imperviousness ratio, and (3) the combination of the area size and ...
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Project - Rouge River Watershed Management Plan
Client: Toronto and Region Conservation Authority. Don Ford, P.Geo. Manager, Hydrogeology, 5 Shoreham Drive, Downsview, ON M3N1S4 Tel:416-661-6600×5369 dford@trca.on.ca Key Personnel: Dirk Kassenaar and E.J. Wexler Building on earlier work on the Oak Ridges Moraine, Earthfx worked with the Toronto and Region Conservation Authority (TRCA) to develop key surface water and ...
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Cryptosporidium source tracking in the potomac river watershed
To better characterize Cryptosporidium in the Potomac River watershed, a PCR-based genotyping tool was used to analyze 64 base flow and 28 storm flow samples from five sites in the watershed. These sites included two water treatment plant intakes, as well as three upstream sites, each associated with a different type of land use. The uses, including urban wastewater, agricultural (cattle) ...
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Impacts of land use and land cover changes on evapotranspiration and runoff at Shalamulun River watershed, China
The study assesses the effect of land use and land cover changes (LUCC) on evapotranspiration and runoff in the Shalamulun River watershed of 2,453 km2 located in Inner Mongolia Autonomic Region of China. First, Landsat Thematic Mapper (TM) and Enhanced Thematic Mapper Plus (ETM+) images from 1987, 2001 and 2007 are used to quantify LUCC in the watershed. A knowledge-based decision tree (K-DT) ...
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Water budget analysis of small forested boreal watersheds: comparison of
Sphagnum bog, patterned fen and lake dominated downstream areas in the La Grande River region, QuébecA water budget analysis (precipitation (P), surface runoff (Q), evapotranspiration (ET) and storage variations (ΔS)) was completed over a 3-year span for two Sphagnum bogs, three patterned fens and two shallow lakes all located in the La Grande River watershed in central Québec. The high variability of P from 2005 to 2007 during summer and fall (July to October) allowed us to ...
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Spatiotemporal variation of bacterial water quality and the relationship with pasture land cover
Pathogens are a major cause of water quality impairment and public health concern world-wide. In the United States, each state is tasked with developing water quality standards (WQS) to protect the designated use(s) of waterbodies. Several streams in the Illinois River Watershed in northwest Arkansas are currently listed as impaired due to elevated levels of pathogens. Our objective was to ...
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Optimal operation of a multi-reservoir system for environmental water demand of a river-connected lake
Dongting Lake, a large river-connected lake in the Yangtze River watershed, plays important roles in flood control, drought mitigation, and biodiversity conservation. Its ecosystem has recently been severely affected by upstream water resource development such as reservoir operations. In this study, an optimization model is developed for the operation of a multi-reservoir system, including ...
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Changes in chemical and physical properties of stream water across an urban-rural gradient in western Georgia
The Middle Chattahoochee River Watershed in western Georgia is undergoing rapid urban development. Consequently, Georgia’s water quality is threatened by extensive development as well as other land uses such as grazing. Maintenance of stream water quality, as land development occurs, is critical for the protection of drinking water, biotic integrity, and stream morphology. A two-phase, ...
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Seasonal Fluctuation in Heavy Metal Pollution in Iran`s Siahroud River
Abstract BackgroundThe management of its available water resources has become a key issue for Iran. During the last few decades, the water quality of Siahroud River in the coastal plain of the Caspian Sea in Gilan Province in Northern Iran has significantlydegraded. The scarcity of water has been compounded by rapid population growth and increasing pollution from fertilizers, pesticides, and ...
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Relationship between land use and water quality in a small watershed in South Korea
Recent research and monitoring undertaken by various institutions have emphasized measurements of river-water quality. Based on the results, government agencies have set guidelines to improve river-water quality management. However, the relationship between water quality and land use/land cover (LULC) has not been examined closely in South Korea to date. This study investigated this relationship ...
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Geomorphology-based genetic programming approach for rainfall–runoff modeling
Nowadays, artificial intelligence approaches such as artificial neural network (ANN) as a self-learn non-linear simulator and genetic programming (GP) as a tool for function approximations are widely used for rainfall–runoff modeling. Both approaches are usually created based on temporal characteristics of the process. Hence, the motivation to present a comprehensive model which also ...
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Project - Phase 2 Review of Potential Cumulative Effects to Surface Water and Groundwater from In-Situ Oil Sands Operations, Focusing on the MacKay River Watershed
Client: Cumulative Environmental Management Association (CEMA), Ms. Katherine Duffett, 9914 Morrison Street, Suite 214 Fort McMurray, AB T9H 4A4 Jon Paul Jones, Ph.D., Senior Water Resources Modeller, Suncor Energy Inc. 150 – 6th Avenue S.W., Calgary, Alberta, Canada, T2P 3E3 Tel: 403-296-8128 jojones@suncor.com Key Personnel: Dirk Kassenaar, E.J. Wexler, Earthfx Inc. ...
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Hydrologic sensitivity of the Upper San Joaquin River Watershed in California to climate change scenarios
To examine the hydrological system sensitivity of the southern Sierra Nevada Mountains of California to climate change scenarios (CCS), five headwater basins in the snow-dominated Upper San Joaquin River Watershed (USJRW) were selected for hydrologic simulations using the Hydrological Simulation Program-Fortran (HSPF) model. A pre-specified set of CCS as projected by the Intergovernmental Panel ...
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Effects of highway construction on stream water quality and macroinvertebrate condition in a Mid-Atlantic Highlands watershed, USA
Refining best management practices (BMPs) for future highway construction depends on a comprehensive understanding of environmental impacts from current construction methods. Based on a before-after-control impact (BACI) experimental design, long-term stream monitoring (1997–2006) was conducted at upstream (as control, n = 3) and downstream (as impact, n = 6) sites in the Lost River watershed of ...
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Integration of the rice paddy water management into a coupled surface-subsurface water flow model in the Sakuragawa River watershed (Japan)
Rice paddy water management was integrated into a distributed three-dimensional surface and subsurface coupling hydrological model of the Sakuragawa River watershed. This watershed is located in the Kanto Plain in Japan and includes the hillside of Mt. Tsukuba. Therefore, this watershed includes both steep mountainous areas and rice paddy-dominated flat land. Thus, water management of rice ...
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A watershed water quality evaluation model using data mining as an alternative to physical watershed models
This paper presents a data mining (DM)-based approach to developing a watershed water quality evaluation model (water quality evaluation model based on data mining (WQEMD)) as an alternative to physical watershed models. Three DM techniques (i.e. model tree, artificial neural network, and radial basis function) were employed to develop a WQEMD based on watershed characteristics (e.g. ...
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Water quality and non-point sources of risk: the Jiulong River Watershed, P. R. of China
Retrospective water quality assessment plays an essential role in identifying trends and causal associations between exposures and risks, thus it can be a guide for water resources management. We have developed empirical relationships between several time-varying social and economic factors of economic development, water quality variables such as nitrate-nitrogen, CODMn, BOD5, and DO, in the ...
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Neural network approach to output updating for the physically–based model of the Upper Thames River watershed
This study presents an output updating procedure for the deterministic physically–based model of the Upper Thames River watershed, Ontario, Canada. In addition to streamflow and rainfall, this procedure uses as inputs meteorological variables not employed in the model calibration. The main hydrological processes involved in transformation of rainfall into runoff are mathematically expressed using ...
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THE SPRING RUNOFF IN NEBRASKA'S ELKHORN RIVER WATERSHED AND ITS IMPACT ON TWO SENTINEL ORGANISMS
The objectives of the present study were to determine 1) if temporal variability influenced the toxicity of Elkhorn River water and 2) if the toxic effect was consistent between two sentinel organisms, the fathead minnow (Pimephales promelas) and the northern leopard frog (Rana pipiens). During spring 2012, atrazine indicator strips were used to document the occurrence of agrichemical pulses ...
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Hybrid wavelet-support vector machine approach for modelling rainfall–runoff process
Because of the importance of water resources management, the need for accurate modeling of the rainfall–runoff process has rapidly grown in the past decades. Recently, the support vector machine (SVM) approach has been used by hydrologists for rainfall–runoff modeling and the other fields of hydrology. Similar to the other artificial intelligence models, such as artificial neural network ...
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