Table of Contents of the 2nd International Symposium Continues

PROCEEDINGS OF THE 2ND  INTERNATIONAL SYMPOSIUM ON EROSION IN SOUTHEASTERN NIGERIA HELD AT THE FEDERAL UNIVERSITY OF TECHNOLOGY, OWERRI, NIGERIA, UNDER THE AUSPICES OF THE EUROPEAN ECONOMIC COUNCIL (EEC) SUPPORTED EROSION RESEARCH PROJECT, INSTITUTE OF EROSION STUDIES (IES), 20-25TH ., 1992.

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PROCEEDINGS OF THE 2ND  INTERNATIONAL SYMPOSIUM ON EROSION IN SOUTHEASTERN NIGERIA HELD AT THE FEDERAL UNIVERSITY OF TECHNOLOGY, OWERRI, NIGERIA, UNDER THE AUSPICES OF  THE EUROPEAN ECONOMIC COUNCIL (EEC) SUPPORTED EROSION RESEARCH PROJECT, INSTITUTE OF EROSION STUDIES (IES), 20-25TH ., 1992.


ISE / SEN 92/SE.03

ANTHROPOGENIC DISTURBANCE OF SEDIMENTARY EQUILIBRIUM: GULLY EROSION AND FILLING UP OF RIVER BEDS IN SELECTED AREAS IN SOUTHEASTERN NIGERIA

 

IBE, K.M AND S. ANYANWU

Department of Geosciences, Federal University Of Technology, Owerri

and

SOWA, A

WbI Umwelttechnik, Lohweg 27, 8480 Weiden, Germany

Abstract

In nature, erosion and deposition of sediments are at sites and at rates in a balance determined by the natural attributes of sources rocks and climatic factors. In recent times, however, constant anthropogenic activities in the sedimentary environment have greatly disturbed that equilibrium in many areas. The disappearance of Nwaorie River in Imo State, South-eastern Nigeria has prompted the authors to carry out the investigations presented in this paper. The described phenomenon can be attributed to filling up of the river bed by sediments eroded from the catchment and upstream areas. Therefore, an attempt has been made to show the relationships between population density, constructional, industrial and agricultural activities and soil erodibility. In a large view, intensive deforestation together with an equi-temporal intensification of agricultural activities range among the main factors responsible. In the presented case however, uncontrolled sand dredging activities in the downstream area of Nwaorie River contribute to the hazardous disturbance of the sedimentary equilibrium. Coincidently a rapid deterioration of surface-and ground-water quality can be observed in the observed hydro chemical parameters. The presented study is an example of environmental impacts caused by anthropogenic activities that is symptomatic for the extremely sensitive balance of nature especially in tropical and sub-tropical areas.

PROCEEDINGS OF THE 2ND  INTERNATIONAL SYMPOSIUM ON EROSION IN SOUTHEASTERN NIGERIA HELD AT THE FEDERAL UNIVERSITY OF TECHNOLOGY, OWERRI, NIGERIA, UNDER THE AUSPICES OF  THE EUROPEAN ECONOMIC COUNCIL (EEC) SUPPORTED EROSION RESEARCH PROJECT, INSTITUTE OF EROSION STUDIES (IES), 20-25TH ., 1992.


ISE / SEN 92/SE.04

SOCIO-ECONOMIC IMPACT OF EROSION – INDUCED WATER POLLUTION ON SELECTED COMMUNITIES IN IMO AND ABIA STATE OF NIGERIA

OKEKE, P.N. AND C.C. ASIABAKA

Erosion Research Centre, Federal University Of Technology, P.M.B. 1526, Owerri Nigeria

Abstract

The paper examines the socio-economic impact of erosion influenced water pollution on eight communities in Imo and Abia States of Nigeria. These communities were selected because their major source of drinking water depended on four erosion prone Rivers; Njaba, Ikwu, Eme, and Imo. Data was collected using personal observation, individual and group interviews. One hundred and sixty respondents comprising of farmers, and other villagers participated in this study. Results show that 95% of the respondents perceived that pollution deprived them of their source of water for domestic uses. High turbidity of the rivers made them unsuitable for recreational activities such as swimming. It was also found that pollution caused dearth of fish during the study period. Results also show that flooding along the river banks lead to premature harvest of crops. The study further found that the cost incurred in buying water treatment chemicals by Water Boards increased by about 5%, coupled with additional cost of maintaining equipment which depreciated at an accelerated rate. The study concluded that erosion influenced water pollution has an adverse socio-economic impact on people in the eight communities and recommended appropriate control measures to check this problem.

PROCEEDINGS OF THE 2ND  INTERNATIONAL SYMPOSIUM ON EROSION IN SOUTHEASTERN NIGERIA HELD AT THE FEDERAL UNIVERSITY OF TECHNOLOGY, OWERRI, NIGERIA, UNDER THE AUSPICES OF  THE EUROPEAN ECONOMIC COUNCIL (EEC) SUPPORTED EROSION RESEARCH PROJECT, INSTITUTE OF EROSION STUDIES (IES), 20-25TH ., 1992.


ISE / SEN 92/SE.05

 

SOIL EROSION AND WATER QUALITY MANAGEMENT IN AKWA IBOM STATE OF NIGERIA

UMOH, U.T

Department Of Geography, Federal University Of Technology, Minna

Abstract

Soil erosion occurs in several parts of Nigeria under different geologic, climatic and soil conditions. Akwa Ibom State, located at the southeastern corner of Nigeria, lying between latitudes 4033’ and 5033 north and longitudes 7025 and 8025’ east and experiencing humid tropical type of climate suffers from ravages of soil erosion at various locations. Soil erosion which has some hydrological consequences therefore calls for strategies of water quality management. Four sets of factors combine to cause soil erosion in Akwa Ibom State. Surface and groundwater quality are assessed as they are important component of the natural hydrological cycle which constitute major sources of water for multiplicity of uses. The erodibility of soils calculated by the monograph method was low and ranged between 0.017 to 0.075 t. ha. hr. ha-1 MJ-1 mm-1. In most locations, the product of low erodibility and high erossivity gave potential soil losses that ranged from 830 to 1900 t/ha//yr. Hydrological consequences of soil erosion include blocking of steam channels, variation of ground water level and drying up of streams. Available surface water supply sources are sampled, so also are some boreholes in the study area. Bacteriological, physical and chemical quality of the identified water sources were analyzed and found to be fair while some are hard. Possible pollution of ground and surface water are indicated and realistic treatment/management methods proffered.

PROCEEDINGS OF THE 2ND  INTERNATIONAL SYMPOSIUM ON EROSION IN SOUTHEASTERN NIGERIA HELD AT THE FEDERAL UNIVERSITY OF TECHNOLOGY, OWERRI, NIGERIA, UNDER THE AUSPICES OF  THE EUROPEAN ECONOMIC COUNCIL (EEC) SUPPORTED EROSION RESEARCH PROJECT, INSTITUTE OF EROSION STUDIES (IES), 20-25TH ., 1992.


ISE / SEN 92/SE.0

THE RATE OF ADOPTION OF EROSION CONTROL MEASURES AMONG FARMERS IN S.E NIGERIA

ASIABAKA, C.C   AND J.E NJOKU

Federal University of Technology, Owerri

Abstract

This study focussed on the rate of adoption of erosion control measures among farmers of Southeastern Nigeria. Data was collected from farmers from Orlu area of Imo State. Orlu erosion axis was selected because some erosion control packages such as alley cropping, contour bunding and planting across the slope have been introduced to farmers in the area. Findings show that the rate of adoption was 80%, while most of the technologies introduced to the farmers were adopted. Data analysis also showed that disseminating erosion control packages were most effective through the use of cooperative societies.

PROCEEDINGS OF THE 2ND  INTERNATIONAL SYMPOSIUM ON EROSION IN SOUTHEASTERN NIGERIA HELD AT THE FEDERAL UNIVERSITY OF TECHNOLOGY, OWERRI, NIGERIA, UNDER THE AUSPICES OF  THE EUROPEAN ECONOMIC COUNCIL (EEC) SUPPORTED EROSION RESEARCH PROJECT, INSTITUTE OF EROSION STUDIES (IES), 20-25TH ., 1992.


ISE / SEN 92/SE.08

DEFORESTATION AND RELATED PROBLEMS OF NIGERIA’S SOUTH-EAST AGRO-ECOLOGICAL ZONE: WHICH WAS FORWARD TOWARDS ACHIEVING SUSTAINABLE FOOD PRODUCTION

 

ESHETT, E.T

School Of Agriculture and Agricultural Technology, Federal University Of Technology, P.M.B.1526 Owerri, Nigeria

Abstract

Although endowed with climatic conditions which are generally conducive to the growth of a variety of food and tree cops and forests as a whole, the soils of Southeastern Nigeria which underlie these lush tropical forests are low in native chemical fertility, subject to a rapid sheet or gully erosion, and incapable of sustaining intensified agricultural production once the protective cover is cleared. Several decades of extensive forest clearance and / or exploitation in eastern Nigeria have led to widespread gully erosion problems and severely reduced the ability of the diminishing land systems to keep pace with an exponentially increasing demand for food, fuel wood, and other related human needs. There is therefore the need for conservation – oriented agricultural technologies, such as agro- forestry, with inbuilt sustainability perspectives. This paper has attempted to explain the concept and to outline the elements of intensified agriculture, asserting that developing countries can also achieve agricultural advancement like their developed counterparts by adopting intensified agriculture, by according top priority to the funding of agricultural research, and also by supplying the needed inputs and other enabling infrastructures.

Keywords: Intensified agriculture, forest exploitation, chemical soil fertility, gully erosion, land system, agricultural technology, sustainability perspectives, Southeastern Nigeria.