Assessment of the impact of land cover changes on sediment yield: a case study

Water Supply Pub Date : 2024-02-26 DOI:10.2166/ws.2024.036

Ş. Güvel

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Abstract

Land use is one of the most important variables impacting river basin water and land resource planning and management. Sediment transport in streams is an important issue in the assessment of sediment deposition in dam reservoirs and its impact on operational activities. Evaluation of sediment yield contributes to decision-makers for effective water management and protection of the dam body and its elements. In this study, land use cover changes, in particular in forest areas, agricultural areas, arable lands, permanent crops, heterogeneous agricultural areas, and pastures in the Çakıt and Körkün sub-basins of the Seyhan River basin were examined between 1990 and 2018 using CORINE land use cover (CLC) data. The effect of land use/land cover (LULC) modifications on sediment yield was studied using suspended sediment observation data and CLC data. It was determined that the forest area in the Çakıt sub-basin drainage area increased between 1990 and 2018, and decreased in the Körkün sub-basin. It was determined that the increase in forest area in the Çakıt sub-basin drainage region until 2018 helped to reduce sediment movement. The regression values between forest area and suspended sediment concentration in Çakıt and Körkün sub-basins were found to be 0.9521 and 0.4431, respectively.

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评估土地覆被变化对沉积物产量的影响：案例研究

土地利用是影响流域水资源和土地资源规划与管理的最重要变量之一。溪流中的泥沙输移是评估大坝水库中泥沙沉积及其对运行活动影响的一个重要问题。对泥沙产量的评估有助于决策者进行有效的水资源管理，保护坝体及其组成部分。本研究利用 CORINE 土地利用覆盖（CLC）数据，研究了 1990 年至 2018 年期间塞罕河流域恰克特和科尔昆子流域的土地利用覆盖变化，特别是森林区、农业区、耕地、永久性作物、异质农业区和牧场的变化。利用悬浮沉积物观测数据和 CLC 数据研究了土地利用/土地覆盖（LULC）变化对沉积物产量的影响。结果表明，从 1990 年到 2018 年，恰克特子流域排水区的森林面积有所增加，而科尔昆子流域的森林面积有所减少。据此确定，直到 2018 年，Çakıt 子流域排水区森林面积的增加有助于减少沉积物的移动。在恰克特和科尔昆子流域，森林面积与悬浮泥沙浓度之间的回归值分别为 0.9521 和 0.4431。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Water Supply

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