Original Research Article
Determination of Short Term Erosivity Index for Goronyo Dam, Sokoto State, Nigeria
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Article Number: DRJEIT20858065
DOI: https://doi.org/10.26765/DRJEIT20858065
ISSN: 2354-4155
Vol. 11 (7), Pp. 122-126, July 2023
Copyright © 2023
Author(s) retain the copyright of this article
This article is published under the terms of the
Creative Commons Attribution License 4.0.
Abstract
Rainfall erosivity, considering rainfall amount and intensity, is an important parameter for soil erosion risk assessment under future land use and climate change. The rainfall parameter that expresses the capacity to promote soil erosion is called rainfall erosivity (R), and is commonly represented by the indexes EI30 and KE>25. The evaluation indicated that by defining an erosive rainfall event as(a) rainfall ≥ 12.5 mm or (b) rainfall intensity > 6 mm per 15 minutes. The R factor of the station under studied at Goronyo Dam for year 1988 was 3670.3 J mm/M2yr and that of year 1989 was 558.68 J mm/M2 yr respectively. Therefore, the availability of a rainfall erosivity map is a key issue not only for soil erosion and landslide risk assessment but also for agricultural management practice, soil conservation and climate change.
Keywords: Erosion, rainfall, water, soilReceived: June 8, 2023 Accepted: July 25, 2023 Published: July 31, 2023