EVALUATING SPATIAL DISTRIBUTION OF SOIL EROSION USING WEPP EROSION MODEL AND GIS TOOLS: A REVIEW
Abstract
Soil water erosion is a major global environmental problem. In order to develop a comprehensive soil and water conservation plan, it is essential to estimate runoff and soil loss. Simulation models are important available tools for soil erosion assessment without costly and time consuming field tests. In this paper, the capability of the WEPP (Water Erosion Prediction Project) watershed model for simulating runoff and soil lossisreviewed. Monthly and event-by-event runoff and sediment yieldcan be simulated by the WEPP model.The geo-spatial interface of the WEPP model (GeoWEPP) is used in preparing the database with WEPP. The breakpoint climate data generator (BPCDG) and climate component of the WEPP model (CLIGEN) can be used to generate the climate file. The overall results of the model calibration may show over-predictions or under-predictions.The model may predict sediment yield for selected events with a low ENS but the model performance may be poor for continuous simulating and vice versa. The sensitivity analysis and calibration process can show that the sediment yield and runoff are sensitive in some parameters such as inter-rill erosion and effective hydraulic conductivity. The review indicates that the WEPP model can be used for developing soil and water conservation management plan.The papers published in the journal are licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.
Open Access Journal: The journal allow the author(s) to retain publishing rights without restrictions. Authors are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles, or use them for any other lawful purpose, without asking prior permission from the publisher or the author.
Authors who publish with this journal agree to the following terms:
Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under the Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
