Impact of irrigation with Lake Abaya water on soil quality – southern Rift Valley, Ethiopia

Abstract

The study's aim was to assess the impact of using water from Lake Abaya for irrigation and its impact on soil quality at Mirab Abaya, Ethiopia. Six water samples from the edge of Lake Abaya and 30 (18 irrigated and 12 rain-fed) composite soil samples from farm lands in Wajifo, Fura and Algae were collected. Analyses showed that the use of water from Lake Abaya will bring a soil salinity hazard in future. The soil analyses showed variations in space and time in the physico-chemical components in the study area. The highest salinity was reported from Algae, the closest site to the Lake. The highest soil alkalinity was reported from Wajifo, which has a long irrigation history. The irrigated soils reported higher salinity than the rain-fed soils, indicating that water from Lake Abaya can affect irrigated soil quality. In general, Lake Abaya water is not suitable for salt-sensitive crops and caution is required in using it for irrigation.

Desalination of saline fields by soil leaching in the Karkhehnur Watershed, Iran

“…The results indicated that soil leaching was an effective method to decrease high salt concentrations to levels, which are suitable for the production of semi-tolerant and tolerant crop plants (Setegn et al 2022). Accordingly, with increasing soil depth the effectiveness of soil leaching decreased, however, interestingly the leaching method was able to decrease salt in the soil to the depth of 125 cm, which is a suitable depth for the growth of most crop roots.…”