Relationships between basin area and sediment yield upstream Shiroro reservoir, north-central Nigeria

Daramola Japheth, and Lam, Kuok Choy and Mohd Ekhwan Toriman, and Mokhtar Jaafar, (2020) Relationships between basin area and sediment yield upstream Shiroro reservoir, north-central Nigeria. Geografia : Malaysian Journal of Society and Space, 16 (3). pp. 26-44. ISSN 2180-2491

[img]
Preview
PDF
880kB

Official URL: http://ejournals.ukm.my/gmjss/issue/view/1306

Abstract

Sediment yield and basin area relationship in a watershed is a very crucial factor in Best Management Practices (BMPs) and reservoir sustainability. Therefore, the study was conducted to examines the suspended sediment concentration (SSC) of the four sub-watersheds of Kaduna watershed north-central Nigeria to aid the dam sustainability and BMP within the watershed. Water samples were collected bimonthly for 8 months (March-October 2018) and subjected to laboratory analysis for SSC and turbidity measurements. With the aid of ArcSwat2012, the watershed was delineated into four sub-watersheds, soil and land-use were classified for a proper understanding of the watershed. The findings demonstrated an inverse relationship between the size of the sub-watersheds and SSC. The smallest Dinya sub-watershed (1%) contributes approximately 25% (3781.5mg/l) of the SSC while the largest Kaduna (80%) contributes approximately 26% (3889mg/l), Sarkinpawa (11%) and Gutalu (8%) contributes approximately 26% (3844mg/l) and 23% (3444mg/l) of SSC respectively. The highest average turbidity was recorded in Sarkinpawa sub-watershed, followed by Dinya, Gutalu, and Kaduna. The SSC and turbidity results followed the rainfall pattern while the regression results for the four subwatersheds shows a good level of linearity between SSC, rainfall and turbidity, Therefore, it is recommended that sediment management practice is to be carried out along sub-watersheds Dinya and Sarkinpawa and Gutalu to reduce the high rate of sediment influx into the reservoir from these smaller sub-watersheds. Also, detail study of the smaller sub-watersheds is highly recommended for a better understanding of the factors responsible for high sediment generation in these sub-watersheds.

Item Type:Article
Keywords:Basin area; Best management practice; Kaduna watershed; Suspended sediment concentration (SSC); Shiroro reservoir; Relationship
Journal:Geografia ; Malaysian Journal of Society and Space
ID Code:15833
Deposited By: ms aida -
Deposited On:20 Nov 2020 02:04
Last Modified:22 Nov 2020 17:48

Repository Staff Only: item control page