Evaluation of physical soil and water conservation measures against technical standards across agroecological zones: Insights from the Amhara Region, Ethiopia

Abstract

One of the major global environmental challenges is land degradation, predominantly in developing countries like Ethiopia, where soil erosion threatens ecosystem services. As a response, Ethiopia has carried out a soil and water conservation (SWC) campaign supported by nationally recommended technical guidelines. Nevertheless, there is limited evidence on the compliance status of implemented SWC structures with the recommended standards. This study was designed to evaluate the compliance of implemented SWC structures against nationally recommended specifications in the Amhara National Regional State, Ethiopia. Accordingly, a cross-sectional, field-based assessment was carried out across seven administrative zones, 20 districts, and 71 watersheds, representing major agroecological zones (AEZs). To handle agroecological heterogeneity while targeting the areas having active SWC interventions, a multistage, multi-criteria systematic sampling approach was applied. In total, 528 SWC structures were sampled. Through direct field measurement of structural dimensions and site characteristics necessary for site-specific observation, the Primary data were collected. The secondary data were also collected from the literature. Finally, measured dimensions were subjected to comparison against site-specific design standards derived from national guidelines. The R software was used to analyze the inferential and descriptive statistics. The analysis results showed that only 35%, 81%, 33%, 49%, 27%, 46%, and 47% of structural dimensions fall within the standard across CMMH, CSMMH, TSMMH, TMMH, TSHMH, WML, and WSML AEZs, respectively. The overall compliance rate of the region is 39%. Limited technical supervision and inadequate capacity of field implementers were found to be the main reasons for these deviations. As the study highlights the systematic challenges of translating on paper the SWC guideline to effective restoration field practice, the findings have significant regional and international relevance. It also gives a lesson of emphasizing the importance of strong technical oversight, capacity building, and performance-based evaluation to enhance the effectiveness, efficiency, and sustainability of SWC interventions in other regions facing similar land degradation problems.