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 ...

  • 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

  • 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 ...

  • 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) ...

  • 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

  • Impact of sedimentation on wetland carbon sequestration in an agricultural watershed

    Received for publication January 9, 2008. Landscape redistribution of soil C is common within agricultural ecosystems. Little is known about the effects of upland sediment deposition on C dynamics within riparian wetlands. To assess sedimentation impact, we obtained profile samples of wetland soil and used the combination of 137Cs, 210Pb, and 14C chronological markers to determine rates of C ...

  • Agroforestry Buffers Reduce Runoff from Agricultural Watersheds

    Despite increased attention and demand for the adoption of agroforestry practices throughout the world, rigorous long-term scientific studies confirming environmental benefits from the use of agroforestry practices are limited. The objective of this study was to examine nonpoint-source pollution (NPSP) reduction as influenced by agroforestry buffers in watersheds under grazing and row crop ...

  • Evaluating the success of phosphorus management from field to watershed

    Received for publication January 30, 2008. Studies have demonstrated some P loss reduction following implementation of remedial strategies at field scales. However, there has been little coordinated evaluation of best management practices (BMPs) on a watershed scale to show where, when, and which work most effectively. Thus, it is still difficult to answer with a degree of certainty, critical ...

  • Watershed Development in India - Economic Valuation and Adaptation Considerations

    Watershed development, an ecosystem-based approach for development of rain-fed regions in India, is gaining traction and political support, but how is it contributing to poverty reduction, food security, and climate change adaptation? This paper examines how economic valuation can improve our understanding of watershed development and how to overcome challenges related to data collection, valuing ...

  • Simulating the hydrologic response of a semiarid watershed to switchgrass cultivation

    The conversion of land from existing uses to biofuel cultivation is expected to increase given concerns about the sustainability of fossil fuel supplies. Nonetheless, research into the environmental impacts of biofuel crops, primarily the hydrological impacts of their cultivation, is in its infancy. To investigate such issues, the response of a 1,649 km2 semiarid basin to the incremental ...


    By IWA Publishing

  • Development of SPAWM: selection program for available watershed models

    A selection program for available watershed models (also known as SPAWM) was developed. Thirty-three commonly used watershed models were analyzed in depth and classified in accordance to their attributes. These attributes consist of: (1) land use; (2) event or continuous; (3) time steps; (4) water quality; (5) distributed or lumped; (6) subsurface; (7) overland sediment; and (8) best management ...


    By IWA Publishing

  • Measuring the Effectiveness of Watershed-Based General Stormwater Permitting

    ABSTRACTThe U.S. EPA and most water resources professionals advocate holistic and adaptive watershed management approaches to the protection and restoration of aquatic ecosystems by encouraging pollution control strategies that are developed through collaborative partnerships within a hydrologic boundary. This paper evaluates the effectiveness of the holistic adaptive management approach through ...

  • Comprehensive flood control involving citizens in a Japanese watershed

    In July 2009, the city of Fukuoka, Japan experienced a flood disaster along the Hii River, which runs through densely populated, concrete-covered areas of the city. The drainage system was overwhelmed and the river overflowed due to heavy rainfall and rapid runoff. The event led citizens in its watershed to plan and implement comprehensive flood control. The plan aims not only to mitigate floods ...


    By IWA Publishing

  • 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

  • Flow and high sediment yield from the Huangfuchuan watershed

    This study deals with general features of sediment transport in the Huangfuchuan river, an important branch river of the Yellow river, draining the Loess Plateau in China. The long-term precipitation records at 3 climate stations near the watershed have been used to assess the changes in precipitation in this region. By introducing metrics for runoff and sediment transport, long-term observations ...

  • City of Santa Monica Airport Watershed Management Plan

     ABSTRACT The City of Santa Monica implements best management practices (BMPs) to address urban stormwater runoff and uses a “hierarchy” of BMPs to prioritize implementation based on the principles of protecting public safety and the environment, maximizing environmental benefits, and minimizing costs. The hierarchy of BMPs includes the following (in order of priority): 1) harvesting, ...

  • Partnering in watershed management and community engagement case study

    Challenge: A Fortune 100 company requested our ecological expertise and support for its watershed management program and its pledge to replenish water used in production of its products back to nature and communities in the U.S. and Canada. Antea Group's assistance includes source water protection, community watershed partnerships, and technical support for other water resource initiatives ...


    By Antea Group - USA

  • 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 ...

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