Assessing and Mapping Erosion Risk for Velikoy Sub-watershed within Coruh River Basin in Turkey
Open Access
- 2 July 2018
- journal article
- Published by Dogal Afetler ve Cevre Dergisi in Doğal Afetler ve Çevre Dergisi
- Vol. 4 (2), 210-220
- https://doi.org/10.21324/dacd.415081
Abstract
En tr Vegetation on earth surface is the integral part of the world ecosystems in functioning for varying spatial and temporal scales. Along with other benefits, land-use as a forest can dramatically reduce the soil erosion and water pollution by protecting the soil surface from erosive effects of rainfall. The objective of this study was to determine rill/interrill (surface) erosion risk by using the RUSLE equation for Velikoy sub-watershed (417 km2) which has rich forest-resources within the Coruh River Basin located at northeastern Turkey. Land use and cover (C factor), rainfall and runoff (R factor), soil erodibility (K factor), slope length and steepness (LS factor), and management support practice (P factor) were identified as the sub-factors for the RUSLE equation and were multiplied to estimate soil loss by rill/interrill erosion. Results showed that the mean surface soil erosion from the sub-watershed was around 3.9 t ha-1 yr-1. Of the total study area, 8.2% was estimated as the areas of high and very high risk for the potential surface soil erosion that also indicates prioritization for the implementation of the erosion conservation measures. Yeryüzündeki bitki örtüsü, farklı zamansal ve mekânsal ölçeklerde işlevler gören dünya ekosistemlerinin önemli bir parçasıdır. Diğer birçok işlevinin yanı sıra, arazi kullanımı olarak orman ekosistemleri toprak yüzeyini şiddetli yağmurların erosif etkisinden önemli ölçüde koruyarak toprak erozyonu ve su kirliliğini önemli ölçüde azaltırlar. Bu çalışmanın amacı; Türkiye’nin kuzeydoğusunda yer alan Çoruh Nehri Havzası’nda zengin orman kaynaklarına sahip bir alt havza olan Veliköy’ün (417 km2) yüzey erozyon riskini RUSLE yöntemiyle belirlemektir. Bu amaçla, RUSLE denklemini oluşturan bitki örtüsü (C), yağış (R), toprak erodibilitesi (K), yamaç uzunluğu/eğim (LS) ve koruma faaliyeti (P) faktörleri birbirleriyle çarpılarak yüzey erozyonuyla kaybolan toprak miktarı tahmin edilmiştir. Çalışmanın sonunda, bu alt havzadan yüzey erozyonuyla kaybolan toprak miktarı yaklaşık 3.9 t ha-1 yıl-1 bulunmuştur. Üretilen toprak kaybı haritaları Veliköy alt havzasının %8.2’sinin erozyon potansiyeli açısından yüksek ve çok yüksek riskli alanlar sınıfına girdiğini göstermiştir. Dolayısıyla, gerçekleştirilecek erozyon kontrol faaliyetleri öncelikli olarak bu alanlarda yoğunlaştırılmalıdır.Keywords
This publication has 15 references indexed in Scilit:
- Stream bank erosion as a source of sediment and phosphorus in grazed pastures of the Rathbun Lake Watershed in southern Iowa, United StatesJournal of Soil and Water Conservation, 2012
- Estimation of soil erosion using RUSLE in a GIS framework: a case study in the Buyukcekmece Lake watershed, northwest TurkeyEnvironmental Earth Sciences, 2011
- Soil erosion and sediment yield modeling using RS and GIS techniques: a case study, IranArabian Journal of Geosciences, 2010
- Rates and spatial variations of soil erosion in Europe: A study based on erosion plot dataGeomorphology, 2010
- Regional soil erosion risk mapping using RUSLE, GIS, and remote sensing: a case study in Miyun Watershed, North ChinaEnvironmental Earth Sciences, 2010
- Corrigendum to “Predictability and uncertainty of the soil erodibility factor using a global dataset” [Catena 31 (1997) 1–22] and to “Erratum to Predictability and uncertainty of the soil erodibility factor using a global dataset” [Catena 32 (1998) 307–308]CATENA, 2002
- Predictability and uncertainty of the soil erodibility factor using a global datasetCATENA, 1997
- Physical Basis of the Length‐slope Factor in the Universal Soil Loss EquationSoil Science Society of America Journal, 1986
- Hydrometer Method Improved for Making Particle Size Analyses of Soils1Agronomy Journal, 1962
- AN EXAMINATION OF THE DEGTJAREFF METHOD FOR DETERMINING SOIL ORGANIC MATTER, AND A PROPOSED MODIFICATION OF THE CHROMIC ACID TITRATION METHODSoil Science, 1934