# Diversion Structures
Diversion structures are used on surface water sources like rivers.
They are used for diverting portion of the water flowing on a stream for use in irrigation.
Water on a stream or river cannot be diverted 100%.
# Types of Diversion Structure
Run-off-the-river
Diversion dam
Intake type
Pump
Impounding
Earth/Rock Fill type
Concrete Type
# 1. Run-Off-The-River
- Directly diverts the water
# 1.1 Diversion Dam
# Pros
Increase water level
Stablize the river bed
# Cons
Tedious calculations for the designer
Formation of afflux effect
Tendency to flood upstream areas
# 1.2 Intake Type
Used when there is no need to increase the water elevation in the stream.
# Pros
Will not cause flooding in the upstream area
Lesser cost than intakes with diversion dam
# Cons
We cannot maximize the extraction of water from a river
Stabilization of riverbed not guaranteed (Side intakes)
Sometimes there is zero inflow
# 1.3 Pumping
# Pros
No need for any obstruction structure most of the time
Less expensive if using solar powered systems
# Cons
- Usually expensive for some farmers/users
# 2. Impounding Dam
# Pros
Stores water during the rainy season
Can be used for flood control
Most likely could be integrated with multiple purposes
# Cons
- Necessity for bigger fundings
# Sample Multi Purpose Dams
# 1. Magat Dam
Magat Reservoir floating solar power project.
# 2. San Roque Dam
