Chapter 10: Appendix 189
Paved areas installedfor livestock use will increase organic, bacteria, and nutri-
ent loading to
waters. Changes in ground water
be
Nitrate nitrogen applied as fertilizer in excess of vegetation needs may move with
infiltrating waters. The extent of the problem, if any, may depend on the actual
amount of water percolating below the root zone.
Hedgerow Planting (422): Establishing a living fence of shrubs or trees in,
across, or around a field.
Hillside Ditch (423): A channel that has a supporting ridge on the lower side
constructed across the slope at definite vertical intervals and gradient, with or
without a vegetative barrier
Improved Water Application (197): [ADD DEFINITION]
Irrigation Canal or Lateral (320): A permanent irrigation canal or lateral con-
structed to convey water from the source of supply to one or more farms
Irrigation Field Ditch (388): A permanent irrigation ditch constructed to convey
in a farm distribution system.
water from the source of supply to a field or
The standard for this practice applies to open channels and elevated ditches of
or less capacity formed in and with earth materials.
Irrigationfield ditches typically
irrigation rvaterfrom the source of supply-
ing to afield or fields. Salinity changes may occur in both the soil and water:
This will depend on the irrigation water quality, the level of
management,
and the geologic materials of the area. The quality of ground and
water
may be altered depending on environmental conditions. Water lost from the irri-
gation system to downstream runoff may contain dissolved substances, sediment,
and sediment-attached substances that
degrade water quality and increase
temperature. This practice
make
available for
but may
not significantly increase habitat.
planned grades.
The effects of this practice
on the level of irrigation water management.
If plant root zone soil water is properly managed, then quality decreases of sur-
face and ground water may be avoided. Under poor management, ground and
surface water quality may deteriorate. Deep percolation and recharge with poor
quality
may lower aquifer quality.
leveling may minimize erosion and
when runoff occurs concurrent sediment yield reduction. Poor management
cause an increase in salinity of soil, ground and
waters. High efficiency
surface irrigation is more probable when earth moving elevations are laser con-
trolled.
Irrigation Pit or Regulating Reservoir, Irrigation Pit
A small storage
reservoir constructed to regulate or store a supply of water for irrigation
Irrigation Pit or Regulating Reservoir, Regulating Reservoir
A small
storage reservoir constructed to regulate or store a supply of water for irrigation.
Irrigation Storage
(436): An irrigation water storage structure made
by constructing a dam.
Chapter 10-l 89:
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