watershed Articles

  • Monitoring watershed health

    Background Municipal water quality managers recognize the need for data that can be used to monitor and assess the impact of urbanization on the condition of natural watersheds. Storm events, in conjunction with the alteration of native landscape, building of roads and overuse of fertilizer, can contribute to excess nutrients, sediment and other pollutants in environmentally significant ...


    By OTT HydroMet

  • Monitoring Tools for Watershed Assessments

     Weston Solutions, Inc. (WESTON®) has designed and implemented a watershed-based monitoring program with the San Diego County Copermittees. The monitoring program includes three elements: Mass Loading Station (MLS) Monitoring, Stream Bioassessment Monitoring, and Ambient Bay and Lagoon Monitoring. The core program includes the collection and analysis of stormwater runoff during three storm ...


    By Weston Solutions, Inc

  • Watershed Project Presents Challenges

    Dennis McAlpine, P. E., project engineer at Houston Engineering, Inc. (HEI) acknowledges he enjoys a professional challenge. He has one. And so do several other folks connected with a $3 million water management project to clean up lakes in the Rice Creek Watershed District (RCWD), as well as other projects. The district is in the north/northeast sector of the metropolitan area and includes parts ...


    By EPG Companies Inc.

  • Sewage Treatment – Small System in a Watershed

    ABSTRACT:Water purveyors, in examining their watersheds, have raised concerns over small community pollution sources, particularly over phosphorus, nitrogen, pathogens and suspended solids. As our population has increasingly moved further upstream in watersheds, the application of classic sewage treatment plants (STPs) have been pushed to their limit of design, especially in light of the need by ...

  • EVALUATING HSPF IN AN ARID, URBANIZED WATERSHED

    The Hydrologic Simulation Program-FORTRAN (HSPF) is a powerful time variable hydrologic model that has rarely been applied in arid environments. Here, the performance of HSPF in southern California was assessed, testing its ability to ...

  • Sizing mitigation wetlands in agricultural watersheds

    In this study, we investigated use of microcosms to supplement field studies for establishing the size of wetlands required to mitigate nitrate pollution in agricultural watersheds. Wetlands investigated in this study were located in San Joaquin Valley (California, USA) and demonstrated mean nitrate-nitrogen mass removal efficiencies ranging between 10 and 34%. Mean areal nitrate removal ...


    By IWA Publishing

  • Characterization of phosphorus sources in rural watersheds

    Received for publication February 21, 2008. Correct identification of P sources in rural watersheds is critical for the development of cost-effective measures to combat agriculturally-driven eutrophication. The chemical composition of various storm runoff types (field surface runoff, field drain outfalls, roads, farmyards, and septic tanks) and the receiving streams in three micro (<10 km2) ...

  • Watershed Planning: Milwaukee Watershed Planning Project: Alternative Plans for Water Quality Improvement

    The USEPA’s watershed approach to facilities planning is being conducted in southeastern Wisconsin by the Milwaukee Metropolitan Sewerage District (MMSD or District), in partnership with the Southeastern Wisconsin Regional Planning Commission (SEWRPC). This combined, innovative project is currently in the last year a five-year study. This paper will present the data and analysis of the ...

  • Modeling river discharge rates in California watersheds

    River discharge rates across all California's watershed have been modeled using the NASA version of the Carnegie-Ames-Stanford Approach (CASA) ecosystem model coupled with a surface hydrologic routing scheme previously called the Hydrological Routing Algorithm (HYDRA). To assess CASA-HYDRA's capability to estimate actual water flows in extreme and non-extreme precipitation years, we have ...


    By IWA Publishing

  • Agro-ecological compensation of watershed based on emergy

    The paper aims at providing a framework to calculate the agro-eco-compensation standard based on the systems agro-ecological concept of embodied energy as emergy. We have proposed a calculation system of eco-compensation standard for sustainable agricultural development based on the convertibility between emergy and price. According to our calculation, the total energy of agricultural ...


    By IWA Publishing

  • Designing a model for integrated watershed management in Iran

    This study, which designs a model for integrated watershed management in Iran, is based on qualitative research applying a grounded theory methodology. Interviewing was the main tool for gathering data. Using snowball sampling, we chose three categories of informants: (a) academics and experienced natural resource experts, (b) representatives of active environmental non-governmental ...


    By IWA Publishing

  • Working Towards Watershed Management in the City of Atlanta

    In 2002, the leadership of the City of Atlanta kicked off a comprehensive program to have the cleanest urban streams and rivers in the country within a decade, recognizing that the City’s future economic growth, jobs, affordability, and quality of life all depend on clean water. Atlanta is faced with many obstacles on the way to meeting this challenge; a few of these include: Ongoing ...

  • Misalignment of watershed and jurisdictional boundaries: the importance of scale

    The misalignment of the boundaries of watersheds and jurisdictions is cited often as a barrier to effective water governance, but the validity of the assertion depends on watershed scale and the decisions or processes involved. The paper probes these decision processes and their alignment with scales of natural watersheds and with governance processes. Two examples from the USA provide context ...


    By IWA Publishing

  • Arctic snow distribution patterns at the watershed scale

    Watershed-scale hydrologic models require good estimates of spatially distributed snow water equivalent (SWE) at winter's end. Snow on the ground in arctic environments is susceptible to significant wind redistribution, which results in heterogeneous snowpacks. The scarcity and quality of data collected by snow gauges provides a poor indicator of actual snowpack distribution. Snow ...


    By IWA Publishing

  • 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, ...

  • Integration of Watershed Planning and Wellhead Protection Programs

    For communities using groundwater as the primary source of water supply, delineating, managing, and protecting the wellhead recharge area is essential to assuring a sustainable water resource system. Because many communities are also required to obtain a National Pollutant Discharge Elimination System (NPDES) permit for discharges from municipal separate storm sewer systems (MS4s), delineating ...

  • Hydroclimatic variability and change in the Chesapeake Bay Watershed

    The Chesapeake Bay (CB) Watershed is undergoing changes in climate, hydrology, and land use. The assessment of hydroclimatic impacts is important for both water quantity and quality management. This study evaluated the hydroclimatic changes using the Coupled Model Intercomparison Project 5 (CMIP5) data which provided statistically downscaled daily precipitation and temperature. An increase of ...


    By IWA Publishing

  • Comparison of different targeting methods for watershed management practices implementation in Taleghan dam watershed, Iran

    Soil erosion and sediment control is important in watersheds with planned dam construction. For an efficient implementation of watershed management practices, identification of critical areas is vital. Many studies have made an effort to identify and prioritize critical sub-watersheds. But very limited studies have been conducted to rank sub-watersheds in terms of their sediment yield ...


    By IWA Publishing

  • 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. ...


    By IWA Publishing

  • Managing the NYC Watershed WWTP Upgrade Program- “Re-tooling an Entire Watershed’s Wastewater Treatment Infrastructure”

    New York City has the largest unfiltered surface water supply in the world. Within the 1,969 square miles tributary to the system's 19 reservoirs and three controlled lakes, are 106 non-City-owned permitted wastewater treatment plants, owned by a wide variety of private, public and municipal organizations. In order to avoid filtration of their 1.3 Billion gallon per day supply, New York City ...

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