Agriculture Reference
In-Depth Information
property site. This is achieved through the use of detention/retention
ponds, creation of bioswales, and selection of pervious paving materi-
als. The use of these site-grading approaches complements larger site
design strategies of creating sustainable and responsible surface water
management. Recharging groundwater, reducing the need for irrigation,
and minimizing the use of costly municipal storm water infrastructure
are goals achieved when site-grading solutions find innovative ways of
keeping storm water on-site.
The grading design for a soccer or football field is similar to that of
the parking lot shown in Figure 13.10-A. However, the contours would
have an elliptical crown surface, not an angular, V-shaped contour. A
crown is formed down the center of the playing field in Figure 13.10-B,
directing water to the sidelines where it is carried away by a swale or a
series of catch basins. The slope of the crown could range from 1 percent
to 2 percent, depending on applicable sports field design standards.
HP
Curve
A
HP
A
A
A
Figures 13.10- a and 13.10-B
Soccer field, Kincaid Park, Anchorage, AK
Figure 13.11 shows a detail of a parking lot designed with a crown
so that the surface water flows toward a 6˝-high curb around the perim-
eter of the lot. Items marked C indicate the elevations at the top of the
curb and coincide where contours 104, 105, and 106 meet the top of
the curb. The contours then continue across the adjacent lawn area.
Notice that spot elevations C are located half the distance between two
