A GIS-based assessment of flood impact on agricultural farm activities along river Dilimi, JOS north local government area of Plateau state

Abstract

Flood is a natural disaster that impacts lives, food security, and ecosystems. Hence, this study sought to investigate the impact of urban flooding on agricultural farm activities along river Dilimi, Jos North LGA Plateau State Nigeria. The study identified urban agricultural farm activities along River Dilimi, and flood-prone areas along the river, and evaluated the economic impact of flood on farmer’s activities in the study area. The study utilized a satellite image of 2021 to digitize urban agricultural farmland along River Dlimi while, DEM, slope, and the landuse of the study area were utilized in an analytic hierarchy process (AHP) on ArcGIS version 10.4 to determine areas prone to flood in the study area. Concerning the economic impact of flooding, the study revealed that loss of farm was ranked 1st, hunger and starvation, loss of properties, and high incidence of poverty with a weighted mean score of 1.22, 1.21, and 1.20 ranked 2nd, 3rd, and 4th while loss of family members, displacement from a natural domain with a weighted mean score 1.19, 1.15 ranked 5th and 6th. Other impacts of floods include damaging roads (1.14), causing malaria (1.13), adding nutrients to the soil (1.11), and causing environmental pollution (1.09). loss of farmland, hunger, and starvation, loss of properties, high incidence of poverty were perceived as serious economic impacts of flood on farmers in the study area. In addition, the result further reveals that river Dilimi covers 1.5%, agricultural landuse covers 2.82%, and other landuse covers 95.66%.