MEASUREMENT OF THE REMAINING STORAGE AND RATE OF SILTATION IN TAGWAI IMPOUNDING RESERVOIR, NIGER STATE
MEASUREMENT OF THE REMAINING STORAGE AND RATE OF SILTATION IN TAGWAI IMPOUNDING RESERVOIR, NIGER STATE
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Date
2012-11
Authors
ALIYU, Vulegbo Adamu
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Abstract
An attempt was made to measure the remaining storage of Tagwai Impounding Reservoir
using bathymetric mapping and remotely sensed surface area data. A field study on Tagwai
reservoir was carried out in Tagwai drainage basin, Niger State, Nigeria. The depths of water
accompanied with their corresponding coordinates were measured from which area and storage
were calculated based on data acquired from the field and that from satellite images. The
remaining storage was at the time of measurement, in year 2010, the same as the total storage
of the reservoir presently because the dead storage has been already silted up. Remaining
storage was in year 2010, 21,650,648 m3 i.e. 76.5 % of the original storage. Thus, rate at which
the storage shrunk from 1978 and 2010 is 207,792 m3/ year. Losses to siltation are 6,649,352
m3 during a period of 32 years. This corresponds to the average annual loss to siltation of 0.73
%. The reservoir will be completely silted up in 136 years from the date of its impoundment i.e.
in the year 2114, if the rate of siltation is not reduced by upgrading the environment in the
drainage basin.
Description
A THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL
AHMADU BELLO UNIVERSITY, ZARIA, IN PARTIAL FULFILMENT
FOR THE AWARD OF MASTER OF SCIENCE IN GEOLOGY
DEPARTMENT OF GEOLOGY
FACULTY OF SCIENCE
AHMADU BELLO UNIVERSITY, ZARIA
NIGERIA
Keywords
MEASUREMENT, REMAINING, STORAGE, RATE, SILTATION, TAGWAI, IMPOUNDING, RESERVOIR, NIGER STATE