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Application of GeoWEPP for Determining Sediment Yield and Runoff in the Orcan Creek Watershed in Kahramanmaras, Turkey †

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ABSTRACT

The geo-spatial interface of the WEPP model called GeoWEPP uses digital geo-referenced information integrated with the most common GIS tools to predict sediment yield and runoff. The model determines where and when the sediment yield and runoff occurs and locates possible deposition places. In this study, the sediment yield and runoff from Orcan Creek watershed in Kahramanmaras region was estimated by using GeoWEPP model. To investigate the performance of the model, the sediment yield and runoff results from the GeoWEPP model were compared with the observed monthly data collected from the sample watershed. The average Root Mean Square Errors (RMSE) between observed and predicted average annual sediment yield and runoff were 2.96 and 8.43, respectively. The index of agreement was 0.98 and 0.99 for sediment yield and runoff, respectively, which indicated that the model predictions provided good results.

No MeSH data available.


Climate file generated based on a PAR file.
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f4-sensors-08-01222: Climate file generated based on a PAR file.

Mentions: To generate climate file with daily values of precipitation, temperature, solar radiation, and wind speed obtained from the weather stations, the WEPP model uses CLIGEN (Climate Generator), which is a stochastic weather generation model [20]. For a specific location and length of time, the “Rock: Clime” application in FS WEPP is used to determine spatial climate variability in mountain regions [7, 15, 20]. To generate climate data, “Rock: Clime” can access database of PRISM (Parameter-elevation Regressions on Independent Slopes Model), which estimates precipitation and temperature based on orographic effects [22]. In “Rock: Clime”, the inputs of monthly average precipitation and temperature values can be adjusted [23]. Since meteorological database in Turkey is not generated in the data format of CLIGEN model, climate parameters for the study area were first obtained from the weather station in the city of Kahramanmaras, tramsformed into the format called PAR file, and then generated in the WEPP as a climate file of CLIGEN (Figure 4). The climate parameters include maximum and minimum air temperature, relative humidity, precipitation, solar radiation, and wind speed.


Application of GeoWEPP for Determining Sediment Yield and Runoff in the Orcan Creek Watershed in Kahramanmaras, Turkey †
Climate file generated based on a PAR file.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3927523&req=5

f4-sensors-08-01222: Climate file generated based on a PAR file.
Mentions: To generate climate file with daily values of precipitation, temperature, solar radiation, and wind speed obtained from the weather stations, the WEPP model uses CLIGEN (Climate Generator), which is a stochastic weather generation model [20]. For a specific location and length of time, the “Rock: Clime” application in FS WEPP is used to determine spatial climate variability in mountain regions [7, 15, 20]. To generate climate data, “Rock: Clime” can access database of PRISM (Parameter-elevation Regressions on Independent Slopes Model), which estimates precipitation and temperature based on orographic effects [22]. In “Rock: Clime”, the inputs of monthly average precipitation and temperature values can be adjusted [23]. Since meteorological database in Turkey is not generated in the data format of CLIGEN model, climate parameters for the study area were first obtained from the weather station in the city of Kahramanmaras, tramsformed into the format called PAR file, and then generated in the WEPP as a climate file of CLIGEN (Figure 4). The climate parameters include maximum and minimum air temperature, relative humidity, precipitation, solar radiation, and wind speed.

View Article: PubMed Central - PubMed

ABSTRACT

The geo-spatial interface of the WEPP model called GeoWEPP uses digital geo-referenced information integrated with the most common GIS tools to predict sediment yield and runoff. The model determines where and when the sediment yield and runoff occurs and locates possible deposition places. In this study, the sediment yield and runoff from Orcan Creek watershed in Kahramanmaras region was estimated by using GeoWEPP model. To investigate the performance of the model, the sediment yield and runoff results from the GeoWEPP model were compared with the observed monthly data collected from the sample watershed. The average Root Mean Square Errors (RMSE) between observed and predicted average annual sediment yield and runoff were 2.96 and 8.43, respectively. The index of agreement was 0.98 and 0.99 for sediment yield and runoff, respectively, which indicated that the model predictions provided good results.

No MeSH data available.