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A mission of the LCBC was in southern Chad, from the 13 to 16 March 2015. The mission

went to collect hydrological data for the

publication of the HYDROMETEO bulle-

tin of the first quarter 2015 and at the

same time to support some key stations

appearing in the list of stations inter-

ested by the Water Charter. The team

was compose of Mr. Michel DIMBELE-

KOMBE, Director of the Basin Observa-

tory/LCBC, Mr. Rohallathi Ndara, mod-

eler / LCBC and Mr. Aina Appolos WAL-

BADET hydrologist with the DRE/Chad.

In this period of the year , the Chari and

Logone are in their decreasing phase. It

is therefore scarce to find data on the

water level in some stations, since the

element 0 and 7 of the scale is often

lacking. An assessment of the status of the stations

visited along the covered route, showed that some of them are no longer usable because the

scale elements are bend, rusted, moved away , sometimes missing. This particularly concerns

the stations on the Chari at Mailao on the Logone at Kim and Moundou and Tandjilé at

Tchoua. At the Tandjilé station at Bolobo, the mission set up the element7 of the scale. In

2014, the observation of a major flood

was not possible because of the lack of

this element. Lastly, the mission paid

allowance to the observer for Gueleng-

deng station on the Chari, correspond-

ing to the first three months of activity.

This station had been abandoned by

the DRE-Chad since long ago. It is now

put into operation by the Basin Obser-

vatory, given its importance to the hy-

drological model of the LCBC. A reader

has been recruited since January and

work equipment was supplied to him to

ensure the operation of the station

The LCBC strengthens its support to hydrometric stations of Chad

Hydrometeo, 1st quarter 2015 Page 1

Display of Equipment at Bongor station

Setting up of element 7 of the scale at Bologo station, Chad

HYDROMETEO Hydrological Bulletin of the 1st quarter 2015 of

the Lake Chad Basin Observatory (LaCBO)

Editing: M. Dimbélé-Kombé; Contributions: A.A. Walbadet, E.C. Moutadé, R. Ndara and A. Lawan

In the 60s, the river Ba-Illi was a stream formed by spill from Logone downstream of Lai,

when the river flow exceeded 1,900 m3/s. The Logone waters transiting in the rainy season

by the floodplain, were then collected by the Ba-Illi, acting as an outlet. But since the 70s,

the flow of the Ba-Illi does not represent more much. Very strong disturbances were born,

due to the presence of a retention pond that was created in 1976. The structure was devel-

oped for rice cultivation, with funding from the World Bank. It is located at Mande in the Di-

vision of Tandjilé-east, between Satégui and Déressia and extends over an area of 2km2. Its

depth can reach 1,5m when it fills with

water in the month of August. During

this period, the water can be pumped

into 3 rice growing areas to be irrigated

via a main channel. The first irrigated

perimeter has an area of 600 ha, the

second has 400 ha and the third 500 ha.

In the region, the growing season be-

gins in June with the arrival of rains,

then often extends longer with the sup-

port of the retention pond.

Changes in the hydrological regime of the Ba-Illi, Chad

Page 2 Hydrometeo, 1st quarter 2015

Availaibility of climate data in the far-north Cameroon

A mission of the Observatory visited the Far-

North of Cameroon from 17 to 21 March 2015,

to assess the availability in climate data in the

public and private institutions in this region.

Several sites producing cotton were visited in-

cluding: Dougoula, Tchatibali, Guider and

Guider. Resource persons and officials were

met, with whom cooperation possibilities were

discussed. Even though rainfall data were made

available, it is however planned that the Obser-

vatory establishes a permanent partnership

framework with the institutions so far visited. This partnership would offer many advan-

tages: the Institute for Agricultural Research for Development (IRAD) of Maroua Regional

Centre has a database; the Cotton Development Company of Cameroon (SODECOTON) has

a network of rain gauges and a long series of rainfall data; the Higher Institute of the Sahel

(ISS) conducts scientific research, and their results is of interest to the LCBC .

Collective transplanting of rice in a pond at Mande (Photo LaCBO March 2015)