Datasets:
patrickbdevaney
/
mia9

Dataset card Data Studio Files
xet
 Community
1
text
stringlengths
0
6.44k
flows were omitted from hydrologic analysis in this assessment. The SFWMM was chosen to create a retrospective time
series of surface water flows from 1965-2000. Time series of
observed (canal discharges) and modeled (SFWMM Alt7r5e)
canal discharges were compared to each other to establish the
validity of the SFWMM flow time series.
Ecological and Hydrologic Targets for Western Biscayne National Park 21
The target flow and retrospective flow time series in the
region of concern were then compared, and those flows
that could be classified as beneficial were summed on both
a daily and monthly basis. The annual average of these flows
was then computed for each period. For the 1.1 M acre-ft/yr
seasonally-varying flow target, the daily Alt7r 1965-2000 retrospective time series of coastal flows that empty directly into
the park or flow through park boundaries (416 K acre-ft/yr
average) provides 341 K acre-ft/yr of flows (82%) that are determined to be required for the protection of fish and wildlife.
The monthly time series, due to the relatively short duration
of most of the peak flows through the canals following storms,
allowed 397 K acre-ft/yr or 92% of the flows to be determined
as required for the protection of fish and wildlife (Table 3).
The high standard deviation of the annual flow volumes is indicative of the large amount of interannual variability in these
freshwater flows.
Table 3. Estimates of the monthly surface flow volumes using
Alt7r (1965-2000) and observed flows (1985-2003) for S-22, G93,
S123, S21, S21A, S20F, S20D, and S197, and the annual average
of flows that are classified as beneficial to fish and wildlife as
per GM #4 (based upon the comparison of the monthly Alt7r and
seasonal target time series).
residence times (months), and with few freshwater surface
inputs ( C -lll), Barnes and Card Sounds quickly become hypersaline during the dry season and periods of mild drought.
This paper has treated ecological targets for Biscayne
National Park and annual estimates of freshwater flows needed
to reach them. Further analysis is needed to develop metrics
for the seasonal and interannual variability associated with hydrologic restoration targets for the park. These ecological and
hydrologic targets will be critical to evaluate potential benefits
of restoration projects for Biscayne National Park and to
assess progress toward ecosystem restoration.
Average annual Standard devia- Estimated
flow volumes tlon beneficial flow
(K acre-ft/yr) (K acre-ft/yr) volume
Observed
(1985-2003) 490 391 455
Alt7r (1965-
2000) 416 382 397
However, the current timing and distribution of these
waters is largely ineffective at preventing hypersalinity. The
islands ringing the bay and the many shallow banks under its
waters act to compartmentalize the bay. South Bay, comprising
perhaps 70% of the bay’s entire area, and subject to about 100
K acre-ft/yr of evaporative loss, today only receives 40% of
the canal-based freshwater flows. The other 60% are released
in the North Bay, where these freshwater flows are quickly
flushed to sea via the tidal cycle and thus, do not remain in
the bay. These volumes of water could arguably be much more
beneficial to South Bay, which not only receives less surface
water inputs and has more restricted connectivity to the
ocean, but also has more extensive potential estuarine habitat
that would benefit from more surface water inputs. Surface
waters redirected from North to South Bay would not only
counter the evaporative losses, but would remain in South Bay
much longer (weeks) than they do in North Bay (days). The
timing is also critical. Without the pre-drainage groundwater
flows and historic creeks that used to provide waters to South
Bay during the dry season, there is not enough flow to South
Bay to prevent evaporation-driven hypersalinity. The situation
is even more pronounced in Barnes and Card Sounds, located
to the south of Biscayne National Park. With tidal inflows
restricted to those spilling from South Bay over the shallow
Cutter Bank at the mouth of Card Sound, characteristic long
22 South Florida Natural Resources Center Technical Series (2006 1)
LITERATURE CITED
Alleman, R. 2003. Historic salinity contours. PowerPoint presentation
to Regional Evaluation Team Southern Estuarine Team on May
21 2003. South Florida Water Management District, West Palm
Beach, Florida.
Alleman, R. and D. M. Parrish. 2005. Hindcasting salinity in Biscayne
Bay. Pp. 201-202. In: Proceedings of the Florida Bay and Adjacent
Marine Systems Science Conference. University of Florida, IFAS.
December 11-14,2005. Duck Key, FF.
Ault, J., G. Diaz, S. Smith, J. Luo, and J. Serafy. 1999. An efficient sampling survey design to estimate pink shrimp population abundance in Biscayne Bay, Florida. North American Journal of Fisheries Management, 19: 696-712.
Berkeley, S. A. and W. L. Campos. 1984. Fisheries assessment of Biscayne Bay; Final draft. Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL. 58 pp. and Final
report to Dade County Department of Environmental Resources
Management, Miami, FF, 212 pp.
Bielsa, F., W. Murdich, and R. Labisky. 1983. Species profiles: Fife
histories and environmental requirements of coastal fishes and
invertebrates (South Florida) - pink shrimp. FWS/OBS-82/11.17.
U.S. Fish and Wildlife Service, National Coastal Ecosystems Team,
Slidell, LA, 21 pp.
Bortone, S. 2003. Biology of the spotted seatrout. CRC Press, LLC,
Boca Raton, FL.
Boyer, J. N. 2004. South Florida coastal water quality monitoring network. FY 2004 Cumulative Report to the South Florida Water
Management District (SFWMD Contract C-15397). West Palm
Beach, FL.
Browder, J., V. Restrepo, J. Rice, M. Robblee, and Z. Sein-Eldin.
1999. Environmental influences on potential recruitment of pink
shrimp, Farfantepenaeus duorarum, from Florida Bay nursery
grounds. Estuaries, 22:484- 499.
Browder, J. A. and H. R. Wanless. 2001. Science survey team report,
pp. 65-230. In: Biscayne Bay Partnership Initiative. Survey Team
Final Reports. Florida Atlantic University, Joint Center for Environmental and Urban Problems, 307 pps + appendices.
Brown, G.L., R. McAdory, G.H. Nail, M. S. Sarruff, C. Berger, and
M.A. Granai, 2003. Development of Two-Dimensional Numerical