Temporal and Spatial Variation Analysis of Vegetation and Soil of Shadegan Wetland in Khuzestan and the Relationship with Wind Erosion
2013
Bayat, Reza | Charkhabi, Amir hosein | Farahpur, Hamid | Jafari, Somayeh | Ghermezcheshmeh, Bagher | Asgharipor, Nezam | Soleimani, Fereidon | Jaferiyan, Marzeyeh | Iranmanesh, Fazel | Kheirkhah, Mirmasud | Hoveyzeh, Hamid | Orsham, Aziz
Proper evaluation of the accuracy and distribution of erosion classes resulted from models can be effective aid in better understanding the results obtained from model and applying them to process the priority areas and conservation programs. Therefore it is necessary to determine the accurately the distribution of erosion classes resulted of the models and improve them .This project was conducted to determine the accuracy and agreement assessment of erosion class maps produced by EPM and MPSIAC models comparing ground natural erosion classes obtained from BLM model. Needed model data were collected and on the basis of models instructions and guidelines, the input factors were rated and used to run in the models. After running the models, erosion class maps were produced and intersected with the resulted obtained from BLM model as the reality of the erosion status, using GIS software and table error matrix. The statistics RMSE,MAE and MBE were used to assess the spatial distributions accuracy of maps. This values in MPSIAC model was lower than EPM model. Thus the accuracy of erosion classes produced by MPSIAC model with Erosion of the ground truth map (BLM model output) is more than EPM model. The accuracy of the maps by comparing them with reality of the erosion status map in 2 reviews (for the whole region and in Sampling points) were Assessment. In both models Overall Accuracy and Kappa Coefficient in the areas sampled is more than the all basin. According to the results In both cases, Value Kappa Coefficient for MPSIAC model is more than the EPM model, so Agreement assessment and the accuracy of erosion classes of MPSIAC model with reality of the erosion status map (BLM model output) is more than EPM model.
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