Page 149 - Çevre Şehir ve İklim Dergisi - Özel Sayı

DETERMINATION OF EROSION STATISTICS BY

LAND USE TYPE AT NATIONAL SCALE WITH THE
DYNAMIC EROSION MODEL AND MONITORING

SYSTEM (DEMMS)

İskender DEMİRTAŞ, Günay ERPUL

Çevre, Şehircilik ve İklim Değişikliği Bakanlığı, Çölleşme ve Erozyonla Mücadele Genel Müdürlüğü
Mail: iskender.demirtas@csb.gov.tr
ORCID: https://orcid.org/0000-0002-7602-4063

Ankara Üniversitesi Ziraat Fakültesi, Toprak Bilimi ve Bitki Besleme Bölümü, Toprak Bilimi Anabilim Dalı
Mail: erpul@ankara.edu.tr
ORCID: https://orcid.org/0000-0002-3797-6969
ABSTRACT
Soil erosion is a major environmental problem in Türkiye, as it is all over the world. In order to quickly assess
erosion and develop policies, the Dynamic Erosion Model and Monitoring System (DEMMS) has become
a supportive planning tool. Accordingly, it has been set up to monitor erosion in 25 river basins based on
RUSLE technology and technically reinforced by RS and GIS. DEMMS has successfully produced erosion
statistics not only for all river basins but also for all provinces of Türkiye, taking into account different land
use types. In addition, the statistical results produced by DEMMS show maps of the distribution of erosion
levels on which detailed action plans to combat soil erosion at the micro-catchment level can be easily im-
plemented. The soil loss calculated on the basis of the statistical results and estimates of DEMMS amounts
to about 642 million tons ha-1 y-1 in Türkiye. Assessing the extent of water erosion in Türkiye by severity,
the results show that 79.4% of the total area is under the influence of very low or low severity erosion, while
20.6% of the total area is affected by moderate, severe and very severe erosion. When the extent of severe
and very severe erosion is classified according to the type of land use, it is established that severe erosion
occurs in agricultural and pasture areas. Setting down the efficiency of the model parameters on the amount
of soil erosion; LS, which represents the combined effect of slope length and steepness on runoff and erosion
processes, stood out in rational efficiency with a value of 47.55%, while C, R, and K were ranked at 34.82%,
14.26% and 3.36%, respectively. At the catchment level, sediment yield per unit area was the highest in
the Çoruh basin at 26 t ha⁻¹ y⁻¹, while sediment yield was the lowest in the Sakarya basin at 4.2 t ha⁻¹
y⁻¹. Evaluating at the amount of soil transported by catchment area, the highest sediment transport of 160
million tons was recorded in the Dicle-Fırat basin, while the lowest sediment yield of 3.6 million tons took
place in the Burdur basin.
Keywords: DEMMS, RUSLE, GIS, Soil Erosion, Land Use.

Makale Atıf Bilgisi: Demirtaş, İ. – Erpul, G. (2024). “Dinamik Erozyon
Modeli ve İzleme Sistemi (DEMİS) ile Ulusal Ölçekte
Arazi Kullanım Türüne Göre Erozyon İstatistikleri-
nin Belirlenmesi”. Çevre, Şehir ve İklim Dergisi, Yıl: 3,
Çölleşme, Erozyon ve İklim Değişikliği Özel Sayısı, s.
(136-155)

Makale Türü: Araştırma
Geliş Tarihi: 01.10.2024
Kabul Tarihi: 25.10.2024
Yayın Tarihi: 08.11.2024
Yayın Sezonu: Kasım 2024
148 Çevre, Şehir ve İklim Dergisi Çevre, Şehir ve İklim Dergisi
Çölleşme, Erozyon ve İklim Değişikliği | Özel Sayı, | 2024