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  11. Investigating The Salinity Distribution Using Field Measurements In The Semi-arid Region Of Southern Ethiopia

Investigating the salinity distribution using field measurements in the semi-arid region of southern Ethiopia

Gezimu Gelu1,2, Katsuaki Komai3, Chanako Dane4

  • 1Laboratory of Hydraulic and Environmental Engineering, Kitami Institute of Technology, 165 Koencho, Kitami, 090-0015, Japan. gezimugelu64@gmail.com.

Environmental Monitoring and Assessment
|January 10, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Irrigated soils in Abaya Chamo show severe salinity and sodicity, particularly at deeper layers. These conditions limit agricultural production, necessitating targeted land reclamation strategies for sustainability.

Area of Science:

  • Soil Science
  • Environmental Science
  • Agricultural Science

Background:

  • Irrigated agriculture in Abaya Chamo faces challenges from soil degradation.
  • Understanding soil salinity and sodicity is crucial for sustainable land management.

Purpose of the Study:

  • To investigate the distribution and severity of soil salinity and sodicity in Abaya Chamo irrigated areas.
  • To analyze soil physicochemical properties influencing these conditions.

Main Methods:

  • Collection of soil and water samples from different depths (0-30 cm and 30-60 cm).
  • Analysis of key soil parameters: Sodium Absorption Ratio (SAR), Electrical Conductivity (Ec), pH, exchangeable cations (Na+, Mg2+, Ca2+, K+), and Exchangeable Sodium Percentage (ESP).
  • Spatial analysis for classification and severity assessment of soil salinity and sodicity.
Keywords:
Irrigation waterSalinitySodicitySuitability

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Main Results:

  • Predominantly strongly saline (72%) and sodic (71.1%) conditions in the surface layer (0-30 cm).
  • Intensification of very strongly saline (78.7%) and sodic (71.9%) conditions at 30-60 cm depth.
  • Combined saline-sodic conditions increased from 91.2% at the surface to 97.1% at deeper layers, indicating severe agricultural limitations.

Conclusions:

  • Soils in the Abaya Chamo catchments exhibit significant salinity and sodicity issues across different classes.
  • Severe agricultural limitations are evident due to widespread combined saline-sodic conditions.
  • Development of targeted remedial measures is essential for land reclamation, enhancing agricultural productivity, and ensuring land sustainability.
Water quality