Watersheds

Watersheds

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  1. Classifying Oregon lake-watershed ecosystems for regional water resources assessment

    Natural lake-watershed ecosystems in Oregon compose a diverse and valuable assemblage of land and water resources. With an increasing demand on lakes for recreation, water supplies, and aesthetic values and an...

  2. The Bull Run River–Reservoir System Model

    The Bull Run watershed is located 41.8 kilometers east of Portland, Oregon in the Mt. Hood National Forest and consists of two reservoirs supplying drinking water to over 840,000 people in the Portland...

  3. Streamflow Modeling of Johnson Creek Subwatersheds Using the Precipitation Runoff Modeling System

    Johnson Creek, in the Portland, Oregon metropolitan region, has several pollutants on the U.S. Environmental Protection Agency’s (EPA) 303(d) list including excess heat, low dissolved oxygen, and harmful...

  4. Soil Moisture Gradients and Controls on a Southern Appalachian Hillslope from Drought Through Recharge

    Soil moisture gradients along hillslopes in humid watersheds, although indicated by vegetation gradients and by studies using models, have been difficult to confirm empirically. While soil properties and...

  5. Theoretical Basis for the CE-QUAL-W2 River Basin Model

    The primary objective of this research is to integrate a riverine model into the existing W2 code that would provide the capability for modeling entire watersheds. This task was accomplished by the following...

  6. Ensemble Prediction and Data Assimilation for Operational Hydrology

    This special section in the Journal of Hydrology will discuss the need for advancing hydrologic ensemble prediction and DA.

  7. Green River CE-QUAL-W2 Project: A Hydrodynamic and Water Quality Study of the Green River King County, Washington

    This report describes the data processing and model calibration performed for a hydrodynamic and water quality model of the Green River, located in King County, Washington. Figure 1 shows the location of the...

  8. Evaluating Global Sensitivity Analysis Methods for Hydrologic Modeling over the Columbia River Basin

    Global Sensitivity Analysis (GSA) approach helps to identify the effectiveness of model parameters or inputs and thus provides essential information about the model performance. The effects of 14 parameters and...

  9. Continuous Deflection Separation of Stormwater Particulates

    Capture of stormwater particulate matter is of concern to watershed managers trying to meet water quality guidelines by removing toxics associated with particulates from natural water bodies. A laboratory...

  10. Automatic Calibration of Water Quality and Hydrodynamic Model (CE-QUAL-W2)

    One of the most important purposes of surface water resource management is to develop predictive models to assist in identifying and evaluating operational and structural measures for improving water quality....

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