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Soil erosion in fired areas is one of the main environmental problem involves degrading the quality of the soil and reducing the productivity of the affected lands. The aim of this work is to implement a procedure that analyzes the change detection of the potential soil eroded in a burned area, and discriminate the amount of potential soil loss. As part of the MESARIP project (in agreement with the Regional Civil Protection) in order to implement the analyses of soil erosion pre and post fire event, using Sentinel 2 data and with the RUSLE (Revised Universal Soil Loss Equation) method in a GIS open source environment, a graphical model has been developed. The application of the RUSLE requires a series of consequential spatial analysis elaborations and, according to this scheme, the model has been developed with the Graphical Modeler. QGIS contains in a single environment a multiplicity of tools and algorithms native to other open source GIS software, such as, for example, SAGA GIS and GRASS GIS. The user interface is very simple and requires basic and thematic input data such as DEM, MASK areas or vegetation indices etc. The advantages in the construction of the model can be identified in the standardization of map algebra operations and also in the speed of execution of the steps. Currently the model has been tested in some burned areas in 2019 located in the northern part of the Apulia Region and will be tested in operational mode during the 2020 summer season.

Fires are one of the main causes of environmental degradation as they have an impact on flora and fauna, can also strongly influence ecological and geomorphological processes and permanently compromise the functionality of the ecosystems and soils on which they impact. The severity of the fire event influences the superficial hydrological response and the consequent loss of soil. Precipitation on the basins recently affected by fires produces an increase in the outflow which commonly transports and deposits large volumes of sediment, both inside and downstream of the burned area. In the years following the fire, the loss of soil is very high and the degradation processes of the soils are much greater than in the pre-event. The aim of this study is to evaluate the potential annual loss due to post-fire erosion using remote sensing techniques, RUSLE (Revised Universal Soil Loss Equation) methodology and GIS tecniques in nine different event occurred in 2019 in the northern part of the Apulia Region (Southern Italy). Geographic Information System techniques and remote sensing data have been adopted to study the post-fire soil erosion risk. Satellite images are the most appropriate for environmental monitoring as they provide high resolution multispectral optical images, infact are able to monitor the development of vegetation by assessing the water content an changes in chlorophyll levels. This study can be useful to spatial planning authorities as a tool for assessing and monitoring eroded soil in areas affected by fires, representing a useful tool for land management.

Günümüzde çok önemli bir sorun olan erozyon, genellikle yanlış arazi kullanımı ve insan tahribatı nedeniyle, eğimli arazilerde toprağın tutucu bitki örtüsünün azaldığı ya da tamamen yok olduğu toprak profilinin üst katmanlarından başlayıp alta doğru devam eden aşınma ve taşınma olayıdır. Çalışma alanı, Ege Bölgesi İç Batı Anadolu Bölümü’nde bulunan ve Büyük Menderes nehri havzasının önemli bir bölümünü oluşturan Işıklı Gölü havzasıdır. Bu çalışmanın amacı; son yıllarda erozyon risk analizlerinin doğru bir biçimde yapılmasında oldukça fazla tercih edilen CBS tabanlı RUSLE yöntemini kullanarak Işıklı Gölü havzasının erozyon risk sahalarının belirlenmesi ve haritalanmasıdır. Bu çalışmada RUSLE yönteminin uygulanması için ArcGIS 10.2 ve ENVİ programları kullanılmıştır. Bu çalışma sonucunda oluşturulan Işıklı Gölü havzası erozyon risk analizi haritasına göre çeşitli risk sınıfları belirlenmiştir. Bunlar; çok hafif, hafif, orta, şiddetli ve çok şiddetli şeklinde beş sınıf olarak ayrılmaktadır. Çalışma alanında uygulanan RUSLE yönteminin diğer bir sonucu ise çalışma alanında meydana gelen erozyonla taşınan sediment miktarının tahmini olarak hesaplanmasıdır. Buna göre Işıklı Gölü havzasında erozyon bakımından en riskli kesimler, havzanın doğusunda yer alan ve oldukça engebeli bir yapıya sahip olan Akdağ kütlesinin bulunduğu kesim başta olmak üzere, havzanın kuzey, kuzeybatı, batı, güneybatı ve güneyinde bulunan diğer dağlık ve engebeli alanlarda bulunmaktadır. Çalışma Işıklı Gölü havzasında tespit edilen erozyon riski taşıyan alanlarda gerekli tedbirlerin alınması için önem taşımaktadır. Böylelikle erozyonla taşınan sediment miktarı en aza indirilerek toprağın korunması sağlanacaktır. Erosion, which is a very important problem nowadays, usually due to improper land use and antropogenic degredation of vegetation on slopes where the holder is reduced or disappears completely, starting from the upper layers of the soil profile and the on goingwear and is moving to ward the bottom. The study area is located in western Anatolia part of Aegean Region and constitute a significant part of the Büyük Menderes river basin it is Işıklı Lake basin. The aim of this study is mapping and identification of erosion risk areas in Işıklı Lake Basin by using GIS based RUSLE method. In this study, GIS-based method for the implementation of RUSLE, ArcGIS10.2 and ENVİ programmes has been used. This study was created as a result of various risk classes according to the map of erosion risk analysis the Işıklı Lake basin were determined. These are; veryslight, slight, moderate, severe and very severe are divided into five classes.Another consequence of theme method implemented in the study area RUSLE erosion from occurring in the study area to calculate an estimate of the amount of sediment that are transported by. Accordingly, in Işıklı Lake basin in terms of soil erosion is the most risky part of the basin is quite rugged and has a structure which is located tothe East sector where the mass is located Akdağ, including basin north, northwest, west, southwest and South are mountainous and hilly areas in other. This study identified are as with erosion risk in the watershed in Işıklı Lake, it is important to take the necessary measures.Thus, the amount of sediment which is carried by erosion, will be minimized and the protection of soil can be provided.