22 CIVIL WORKS GUIDELINES FOR MICRO-HYDROPOWER IN NEPAL
Figure 3.3 Siting of intakes in mountain rivers of Type 1A
River type 1C
Intake selection in these rivers differs from 1A and 1B only in
requiring control of one or more of the channels in order to
ensure that sufficient flow reaches the intake. A possible
arrangement is shown in Figure 3.4.
Figure 3.4 Siting of intake in mountain or steep hill rivers of Type
1c. (Source: Ref. 5)
Gravel bed rivers
These are category 2 rivers (2A, 2B & 2C) which have less steep
channels compared to category 1 types. The riverbeds are mainly
of cobbles and gravel, together with some boulders. Intake sitting
follows the same general principles as in category 1. However,
Photo 3.1 Area of intake in type 2B river (Dhading)