CASE HISTORY CH / EC / NG Rev: 00 Sept 2016 IKOT-ANWATIM GULLY EROSION WORKS IKOT-ANWATIM, CALABAR, CROSS RIVERS Product: , Reno Mattress and

Problem

Due to poor management of the ecosystem and uncontrolled land clearing, storm water run-off has accelerated slope erosion and the occurence of in the community.

The Ikot-Anwatim gully complex has a main gully with five fingers. These gullies pose a threat to human lives because it cuts across neighbouring settlements and farmlands.

These gullies adversely affects the livelihood of major communities of Calabar municipality which includes Ikot- Anwatim, Ikot-Ansa, Ekorinim, Esuk Utan, Ikot Akpanam and Kasuk.

It is furthermore close to the major Murtala Mohammed highway in Calabar which cuts accross the major and During construction of wall at the toe of the slope disrupts the traffic into Calabar.

Solution Due to the imminent danger, the interest of the erosion agencies were high because of the threat it poses to the lives and the livelihood of the inhabitants of Ikot Anwatim.

The local consultant appointed by Cross River NEWMAP to technically appraise the situation adopted an option of incorporating civil works to reclaim the gullies with tree planting, slope stabilization and revegetation in order to return the eroded faces to their original position. Maccaferri Gabion check dams were constructed at intervals and at the toes of steep slopes. Reno mattresses and Geotextiles were installed at the gully bed to address the issue of erosion.

During construction of gabion wall at the toe of the slope

Client: WORLD BANK/FGN Main contractor: A.G VISION NIG LTD Designer: RABIONA ENGINEERING Products used: GABION, RENO MATTRESS, Date of construction Vegetation being restored after construction 2015—ON-GOING

Benefits:  Gabion check dams helps to reduce peak velocity flow.  The Reno-Mattress and Geotextile at the gully bed protects the exposed top surface stopping scouring.  The installation was easy and local labour can be imployed.  It enhanced the community’s livelihood and co-social benefits as human safety in the area and future land use will be practicable  It provides access link between communities separated by the gully.  It restores the ecosystem.

Construction of Checkdam

Side drains protected with Reno Mattress After Construction

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