Table of Contents of the 1st International Symposium Continues

PROCEEDINGS OF THE 1ST  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), 11-12TH APRIL, 1988.

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PROCEEDINGS OF THE 1ST  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), 11-12TH APRIL, 1988.


ISE/SEN/037

GOVERNMENT POLICIES AND PROGRAMES ON EROSION CONTROL IN SOUTHEASTERN NIGERIA

NJOKU, J.E  AND C.C ASIABAKA

School of Agriculture and Agricultural Technology, Federal University of Technology, Owerri.

ABSTRACT

This paper attempts an analysis of government policies and programmes on erosion control in the four Southeastern States of Imo, Anambra, Rivers and Cross River States of Nigeria. It points out the constraints to erosion control and provides suggestions for enhancing government efforts toward erosion control. The data used for analysis were collected through questionnaire interviews of heads of government ministries and Parastatals involved in erosion control in each of four Southeastern States. The results indicate that there is lack of comprehensive policies and programmes on erosion control. Finance is one of the major constraints to policy and programmes implementation. Formulation of more articulate and properly co-ordinated policies and programmes on erosion was well as increased level of funding are suggested.

PROCEEDINGS OF THE 1ST  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), 11-12TH APRIL, 1988.


ISE/SEN/011

THE CHALLENGES OF EROSION IN IMO STATE

ABARIKWU, O.I

Ministry of Agriculture and Natural Resources, Engineering Division, Owerri.

ABSTRACT

Soil erosion in Imo State has assumed disastrous proportions over the past few decades. From a few observations on the land use in the late 60’s and 70’s, the problem of soil erosion seems to have taken Imo State in a storm, and has now affected all parts of the State either in the form of gully or sheet erosion. Factors that are responsible for soil erosion in the state as well as various remediation strategies were discussed.

PROCEEDINGS OF THE 1ST  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), 11-12TH APRIL, 1988.


ISE/SEN/012

EROSION MENACE IN ANAMBRA STATE : GOVERNMENT EFFORTS IN COMBATING IT

OKAMIGBO, F.O.R

Chairman, Anambra State Task Force on Soil Erosion Control,

 Department of Soil Science, University of Nigeria, Nsukka, Nigeria.

 

ABSTRACT

Soil erosion is defined as a systematic removal of soil, including plant nutrients, from the land surface by the various agents of denudation. Soil erosion occurs in several parts of Nigeria under different geological, climatic and soil conditions. Causative agents include wind, rain water, river water or sea waves, population density and anthropogenic activities. Causative agents prevalent in Anambra State are elucidated. The story of soil erosion particularly in Anambra State was traced as far back as 1922 when the first recorded effort at biological control was made. The efforts of the Government of Anambra State to combat the menace are discussed. The special efforts of the Task Force on Soil Erosion Control in Anambra State are elaborated. The census and identification of gully sites conducted in 1987 showed that over 530 gully complexes are ravaging the state. The probable reasons for this high incidence were adduced. The land mass lost to the gullies was estimated at 176,750 hectares, approximating 10% of the total land area of the State. Other losses included over 150 lives, many livestock and civil infrastructure. The value of property and land mass so far lost to gully erosion was estimated at 5.3 billion naira (about 1.4 billion U.S. dollars).Strategies for combating the menace was proposed. They are two main approaches, engineering curative and biological / minor engineering measures, all based on proper watershed protection and management. A call for assistance was made in order that the state did not break up into pieces of badly eroded “islands”.

PROCEEDINGS OF THE 1ST  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), 11-12TH APRIL, 1988.


ISE/SEN/014

SOIL EROSION CONTROL: A CASE STUDY IN AKWA IBOM STATE

ETUKUDO, I.E

Ministry of Agriculture and Natural Resources, Forestry Division Headquarters Uyo, Akwa Ibom State.

ABSTRACT

The location of Akwa Ibom State within the Rain Forest Belt of Nigeria, in addition to having the Atlantic Ocean as its Southern boundary, makes the problem of erosion in the state a peculiar one. The causes and types of soil erosion in the state are reviewed. The major erosion affected sites in each of the 10 (ten) Local Government Areas are listed. Control measures appropriate to the peculiar erosion problems of the state are examined in conjunction with the various agencies which participate in erosion control. Details are given of the measures applied to control erosion in selected areas of  the state where the threat by erosion had reached alarming proportions. The part played by the Forestry Service in applying the biological control measures is emphasized. The constraints militating against the rapid and effective application of control measures are highlighted and suggestions advanced for the future.

PROCEEDINGS OF THE 1ST  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), 11-12TH APRIL, 1988.


ISE/SEN/006

 

AN APPRAISAL OF THE VEGETATION IN ONICHA AND MBAISE GULLIES, IMO STATE

OKORIE, P.E., C.C IBE AND K.C. AKUDIKE

Forestry Research Institute of Nigeria, P.M.B. 5054 Ibadan

 

ABSTRACT

A survey of the vegetation in two gullies in Ahiazu and Onicha Mbaise was carried out to determine species density  and growth. Gmelina arborea Roxb had been introduced in both sites and pines ( Pinus caribaea Mor.) and bamboos (Bambusa vulgaris  Schard) in only the Ahiazu gully, three years  before this sample plots were randomly laid out on hill top, slope and valley portions of each gully and a hundred percent enumeration of the species was taken. The lateral roots of 15 tallest trees (from 3 dominant species) were partially exposed, traced to their tip and their lengths measured. Heights, diameter at breast height(dbh) and crown diameters of the introduced exotics were also measured. The results showed that there were twice more indigenous plant species in Onicha than in Ahiazu gully.The most abundant species in Onicha gully were Acio bateri, Daniellia ogea and Raphia hookeri constituting 22%, 10.1% and 9.2% respectively of the vegetation. Gmelina was the most abundant species in Ahiazu and comprised 27.4%, while Rahia hookeri and Acio bacteri constituted 25% and 20.5% respectively of the vegetation. Daniela ogea and Pentaclethra macrophylla had the longest lateral roots (6.0 m and5.2m respectively) and Gmelina arborea had the greatest height and diameter growth while Bambusa vulgaris had the least. The use of indigenous plant species in soil erosion control is highlighted.

PROCEEDINGS OF THE 1ST  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), 11-12TH APRIL, 1988.


ISE/SEN/039

DEFORESTATION – A CAUSE OF THE ECOLOGICAL DISASTER OF SOIL EROSION IN IMO STATE.

K.M. IBE

School of Earth, Mineral and Natural Science, Federal University of Technology Owerri

ABSTRACT

Soil erosion is a natural process which has been in operation since the formation of the earth. Soil erosion includes both the processes of material acquisition or detachment and that of transportation of soil materials by the erosive agent of water, wind and ice.The impact of the natural geologic erosion was not felt because of its slow rate of operation but of late man’s activity has accelerated the rate of operation of soil erosion to a level which demands huge financial resources in order control the spread of soil erosion. Geographically, Imo State lies between 4 45’ N and 6 15’ N latitudes and between 6 30’ E and 8 15’ E longitudes. This places Imo State in the tropical rain forest zone characterized by heavy rainfall and high temperature. The soils of Imo State are generally of the acid sands which have a high degree of erodibility. The Udi and the Awaka – Orlu escarpments are characterized by steep and unstable slopes. In addition to the above factors Imo State has a high population density of about 450 persons per square kilometer. With the above factors the stage is thus set for a high incidence of soil erosion in the state. The history of accelerated soil erosion in Imo State dates back to the late 1940 and early 1950.