OVERVIEW OF THE IMPACT OF MINING ON THE ... - IIED pubs

3.3.7 Implications for water quality and water resources management
The impacts of seepage into the Chobe and Zambezi rivers are likely to be small. There are no impacts of
mining or mineral processing on water resources or water quality in this sub-catchment.
3.4 The Luiana sub-catchment
3.4.1 General description
3.4.1.1 Hydrology
The Luiana River is a major tributary of the Cuando River in Angola. Flows are seasonal though there is no
information as to the size of the flows.
3.4.1.2 Geology
The Upper Karoo Batoka Basalt Formation underlies the lower reaches of the sub-catchment, covered by
Kalahari Sands. Archaean rocks of the Central African Craton underlie the headwaters of the sub-catchment.
3.4.1.3 Pedology, agriculture and land use
The soils are in two groups: the deeper ferralitic soils of the upper headwaters of the catchment, and Kalahari
Sands over most of the lower reaches of the sub-catchment. The predominance of Kalahari Sands makes the
area generally unsuitable for commercial agriculture, though subsistence agriculture occurs on floodplain levees
along the rivers.
xciv