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Nutrient Load Generated by Storm Event Runoff from a Golf Course Watershed

^a USDA-ARS, 590 Woody Hayes Drive, Columbus, OH 43210
^b Spectrum Research Inc., 4915 E. Superior St., Suite 100, Duluth, MN 55804
^c The Ohio State Univ., 590 Woody Hayes Dr., Columbus, OH 43210
^d USDA-ARS, 808 E. Blackland Rd., Temple, TX 76502

View larger version (44K): [in this window] [in a new window]   Fig. 1. Layout of Morris Williams Municipal Golf Course. Area located between drainage boundaries, Manor Road, and MLK Boulevard was used in the study.

View larger version (27K): [in this window] [in a new window]   Fig. 2. Historical (1856–2005) precipitation reported by National Weather Service for Austin, TX (boxes are bound by 25th and 75th percentile values; line in the box represents the median; whiskers represent the 10th and 90th percentiles) and study period (1 Apr. 1998–31 Mar. 2003) measured precipitation at the experimental watershed site.

View larger version (19K): [in this window] [in a new window]   Fig. 3. Exceedance probability plot of annual precipitation for Austin, TX (1856–2005) and measured annual rainfall recorded during study period.

View larger version (18K): [in this window] [in a new window]   Fig. 4. Annual areal weighted irrigation volumes for managed turf (tees, greens, and fairways) at Morris Williams Municipal Golf Course (MWMGC). Boxes are bound by 25th and 75th percentile values; line in the box represents the median. Monthly volumes were calculated from applied volume multiplied by fractional area: volume applied to greens x 0.025 + volume applied to tees x 0.01 + volume applied to fairways x 0.284.

View larger version (14K): [in this window] [in a new window]   Fig. 5. Relationship between 115 precipitation events and resulting runoff for Morris Williams Municipal Golf Course (MWMGC) during study period (1 Apr. 1998 to 31 Mar. 2003).

View larger version (23K): [in this window] [in a new window]   Fig. 6. Monthly nitrogen application (box plot), mean measured NO3–N loss (solid line), and mean measured NH4–N loss (dashed line) at Morris Williams Municipal Golf Course (MWMGC) for the 5-yr study period. Boxes are bound by 25th and 75th percentile values; line in the box represents the median.

View larger version (22K): [in this window] [in a new window]   Fig. 7. Monthly phosphorus application (box plot) and mean measured PO4–P loss (solid line) at Morris Williams Municipal Golf Course (MWMGC) for the 5-yr study period. Boxes are bound by 25th and 75th percentile values; line in the box represents the median.