watershed model Articles

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 ...

Aug. 7, 2014

By IWA Publishing
Climate change and watershed mercury export: A multiple projection and model analysis

Future shifts in climatic conditions may impact watershed mercury (Hg) dynamics and transport. We apply an ensemble of watershed models to simulate and evaluate the responses of hydrological and total Hg (HgT) fluxes from the landscape to the watershed outlet and in‐stream HgT concentrations to two contrasting climate change projections for a watershed in the southeastern Coastal Plain of the ...

May 22, 2013

By John Wiley & Sons, Ltd.
Geospatial-based automated watershed modeling in Garhwal Himalaya

Oct. 1, 2010

By IWA Publishing
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 ...

Apr. 8, 2015

By IWA Publishing
Watershed modeling to assess the sensitivity of streamflow, nutrient, and sediment loads to potential climate change and urban development in 20 U.S. watersheds.

Watershed modeling was conducted in 20 large, U.S. watersheds to characterize the sensitivity of streamflow, nutrient (nitrogen and phosphorus), and sediment loading to a range of plausible mid-21st century climate change and urban development scenarios. The study also provides an improved understanding of methodological challenges associated with integrating existing tools (e.g., climate models, ...

Oct. 14, 2013

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. ...

Dec. 23, 2015

By IWA Publishing
Post-validation of SWAT model in a coastal watershed for predicting land use/cover change impacts

Watershed models are typically calibrated and validated with the same land use and land cover (LULC) dataset and later used in assessing impacts of changing LULC, such as urbanization, on hydrology and/or water quality. However, their performance in predicting water quality/quantity in response to changing LULC is rarely assessed. The main objective of this paper was to explore the ...

Mar. 26, 2015

By IWA Publishing
Estimation of flow in ungauged catchments by coupling a hydrological model and neural networks: case study

The prediction of hydrological variables for ungauged basins is still a big challenge. Regionalization is the most widely used method to date, which relates parameters of watershed models to catchment characteristics. Relating catchment characteristics to watershed model parameters is too difficult for distributed hydrological models, due to the heterogeneous nature of catchments. A regional ...

Jan. 1, 2011

By IWA Publishing
Modeling low impact development potential with hydrological response units

Evaluations of benefits of implementing low impact development (LID) stormwater management techniques can extend up to a watershed scale. This presents a challenge for representing them in watershed models, since they are typically orders of magnitude smaller in size. This paper presents an approach that is focused on trying to evaluate the benefits of implementing LIDs on a lot level. The ...

Dec. 13, 2013

By IWA Publishing
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 predict annual volume, daily average flow, and hourly flow. The model was parameterized with eight land use categories and physical watershed characteristics. ...

Apr. 1, 2005

By Southern California Coastal Water Research Project Authority (SCCWRP)
Bacteria TMDL Solution to Protect Public Health and Delisting Process in Columbus, GA

Under the Middle Chattahoochee Watershed Plan, the Columbus Water Work’s adaptive TMDL Implementation Planning strategy utilizes comprehensive watershed modeling and implementation of innovative non-point source BMPs to address TMDLs and protect beneficial uses of two waterways in Columbus, GA. Calibrated BASINS modeling is used to demonstrate compliance with bacteria standards for waters listed ...

Oct. 21, 2006

By Water Environment Federation (WEF)
Climate Change and Watersheds: Exploring the Links, Science Matters Newsletter, 2013

EPA water scientists and their partners are studying how climate change may affect watersheds—the network of rivers and streams that feed into larger water bodies such as big rivers, lakes, and oceans. A recent EPA report, referred to as the 20 Watersheds Report, combines climate change models and watershed simulations to develop a better understanding of what changes to streams and rivers ...

Aug. 23, 2013

By IWA Publishing
Estimating changes in river faecal coliform loading using nonparametric multiplicative regression

Faecal coliform (FC) concentration was monitored weekly in the Tangipahoa River over an eight year period. Available USGS discharge and precipitation data were used to construct a nonparametric multiplicative regression (NPMR) model for both forecasting and backcasting of FC density. NPMR backcasting and forecasting of FC allowed for estimation of concentration for any flow regime. During this ...

Mar. 1, 2011

By IWA Publishing
The challenge of documenting water quality benefits of conservation practices: a review of USDA-ARS's conservation effects assessment project watershed studies

The Conservation Effects Assessment Project was established to quantify water quality benefits of conservation practices supported by the U.S. Department of Agriculture (USDA). In 2004, watershed assessment studies were begun in fourteen agricultural watersheds with varying cropping systems, landscapes, climate, and water quality concerns. This paper reviews USDA Agricultural Research Service ...

Jan. 1, 2011

By IWA Publishing
Water Quality Assessment and Onshore Development in Tropical Waters

Standards for bacteriological recreational water quality in Puerto Rico are those proposed by US EPA. The standard for primary contact recreational use has both single-sample limits and running- average threshold limits based on historical data developed for the specific site. La Parguera is the site of a Special Marine Reserve and counts among its unusual habitats a phosphorescent bay, important ...

Oct. 21, 2006

By Water Environment Federation (WEF)
Evaluation of hydrological response to extreme climate variability using SWAT model: application to the Fuhe basin of Poyang Lake watershed, China

Differences between simulated and observed data often occur when the watershed model is applied under extreme climate. It is necessary to assess the stability of hydrological models in a wide range of climate variation. A case study was conducted in Fuhe basin of Poyang Lake, China using the Soil and Water Assessment Tool (SWAT) model, which was calibrated under different climates in average ...

Dec. 28, 2016

By IWA Publishing
A hybrid linear–nonlinear approach to predict the monthly rainfall over the Urmia Lake watershed using wavelet-SARIMAX-LSSVM conjugated model

The present study aimed to develop a hybrid model to predict the rainfall time series of Urmia Lake watershed. For this purpose, a model based on discrete wavelet transform, ARIMAX and least squares support vector machine (LSSVM) (W-S-LSSVM) was developed. The proposed model was designed to handle linear, nonlinear and seasonality of rainfall time series. In the proposed model, time series ...

Aug. 24, 2017

By IWA Publishing
Participatory watershed management (PWM): an approach for integrated development of rural India: a case study from Karnataka, southern India

Watershed management is an emerging concept for the efficient use of rain run-off in the rural areas of India. The approach to watershed management is participatory in nature, people friendly, location specific, processed based and geared to cater to the problems and needs of the rural communities. Operation of watershed management is ideal where the rainfall pattern is very short, uneven and ...

Mar. 18, 2005

By Inderscience Publishers
Travel time of curved parallel hillslopes

Travel time is an important variable that influences the hydrologic response of watersheds. Hydrologic models often do not take the variation of slope along the flow paths, i.e. profile curvature, directly into account. In this study, using a kinematic wave-based model, the effect of profile curvature on the travel time in parallel hillslopes is investigated. Also, the profiles associated with ...

Apr. 10, 2014

By IWA Publishing
Preliminary identification of watershed management strategies for the Houjing river in Taiwan

The Houjing River watershed is one of the three major river watersheds in the Kaohsiung City, Taiwan. Based on the recent water quality analysis, the Houjing River is heavily polluted. Both point and non-point source (NPS) pollutants are the major causes of the poor water quality in the Houjing River. Investigation results demonstrate that the main point pollution sources included municipal, ...

Oct. 1, 2010

By IWA Publishing

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you

Sing-In Linkedin Button

or

First name

Last name

Email

Password

Confirm password

Company name

Website

Company description

Minimum 250 characters

Business type

Industry

Location

Market focus