Synonyms? Rock Breakwater and Living Shoreline Texas Chapter ASBPA 2018 Annual Symposium David Buzan, Cris Weber, Tam Tran, Aaron Petty and Nic Kirk April 24, 2018
Schicke Point
2016
1958
Constructed April 14-May 18, 2017
70 days post-construction (July 27, 2017)
70 days post-construction (July 27, 2017)
6.5 months post-construction (Nov. 29, 2017)
8 months post-construction (Jan. 12, 2018)
6.5 months post-construction (Nov. 29, 2017)
6.5 months post-construction (Nov. 29, 2017)
8 months post- construction (Jan. 12, 2018)
8 months post- construction (Jan. 12, 2018)
Diamondback Terrapin 6.5 months post-construction (Nov. 29, 2017)
8 months post-construction (Jan. 12, 2018)
“… animistic cultures …comprehend stones as persons.”
“Grey rocks are not dull They are underestimated by those who look with their eyes” A. Voicy Baggs Questions David Buzan, david.Buzan@freese.com, 512.617.3164
LA 2010 Water Use TX 2020 Water Use
Water Planning Regions
By Jim Yardley, July 21, 2002 , New York Times
Environmental Flows Advisory Group Science Committee Stakeholders Texas Commission on Environmental Quality Other Groups Science Team
Sound Ecological Environment • Native species • Habitat • Natural flow variability • Ecosystem processes and services
Environmental Flow Regime “… schedule of flow … that reflects seasonal and yearly fluctuations that…vary geographically, by specific location…,… support a sound ecological environment. ” “… without regard to the need for the water for other uses ,….”
Red River - Subsistence
Red River – Large flood
Hydrologic Analysis 7000 Large flood 6000 5000 Pulses 4000 Flow (cfs) 3000 Base Subsistence 2000 1000 0 Day
From: Baustian et al. 2018. Modeling current and future freshwater inflow needs of a subtropical estuary to manage and maintain forested wetland ecological condition. Ecological Indicators, 85: 791-807
Flow Regime: Description not Prescription Not – creating a new ecosystem Flow standards ≠ flow regime Not – values that should never be changed
Successes and Lessons Successes • Flow standards: Selected streams and estuaries for 11 basins • Learned a lot: $6 million budgeted for environmental flows study since 2013 Lessons • Whiskey is for drinking, water is for fighting – Uncertainty and distrust high at beginning • No play, no pay • 1-year deadline – work done quickly • Ecological data related to flow very limited
“The state is facing a future in which water … will be a scare resource that will demand a well-thought-out and integrated approach to stewardship.” Davis, M. and J. Wilkins. 2011. A Defining Resource: Louisiana’s Place in the Emerging Water Economy. Loyola Law Review.
Q: 24,600 cfs with Frequency 1 per 2 years Overbank Volume is 626,471 Flows Duration is 26 Q: 15,000 cfs with Frequency 2 per year Volume is 326,119 Duration is 18 Q: 3,050 cfs with Q: 11,200 cfs with Q: 15,700 cfs with Frequency 1 per Q: 2,930 cfs with Frequency Frequency 1 per High Flow Frequency 1 per season season 1 per season season Pulses Volume is 257,289 Volume is 362,910 Volume is 26,246 Volume is 39,239 Duration is 14 Duration is 19 Duration is 5 Duration is 5 Q: 3,200 cfs with Frequency Q: 7,840 cfs with Frequency 2 per Q: 1,180 cfs with Frequency 2 per season season 2 per season Volume is 18,931 Volume is 141,705 Volume is 4,866 Duration is 5 Duration is 11 Duration is 2 1110 1398 682 819 Base Flows (cfs) 623 820 411 439 340 458 257 265 Subsistence 196 280 70 101 Flows (cfs) Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Winter Spring Summer Fall Wet F = Frequency (per season) Hydrologic Average High Flow Pulse D = Duration (days) Conditions Dry Characteristics Q = Peak Flows (cfs) Subsistence V = Volume (ac-ft)
Red River - Base
Red River – High Base or Low Pulse
Texas
Environmental Flow Analyses “… develop … environmental flow regime for the river basin and bay system…. Consider all reasonably available science,
Recommendation
Challenges • Is the SB3 objective understood in the same way by everyone? • Do participants understand and accept the process? • Previous BBESTS relied heavily on hydrologic analysis and struggled with limited overlay information. • Implementation and interpretation of flow recommendations occurs after the flow regime is described.
Overlays
Sound Ecological Environment (TIFP, 2008) “A resilient, functioning ecosystem characterized by intact, natural processes, and a balanced, integrated, and adaptive community of organisms comparable to that of the natural habitat of a region.”
Indicator Selection Taxonomic Indicator Species/Type Salinity Range Seasonality Classification Habitat Indicator Spring – Summer - Fall Wild celery Vallisneria americana <5 psu for establishment; High Flow-Low Salinity Indicators Spring – Fall (spawning) Atlantic Rangia Rangia cuneata, 2-10 psu for larval survival Winter – Spring (Confirmed 5-15 psu for common in TPWD trawl data. Gulf Menhaden Brevoortia patronus occurrence Bag seine occurrence is spring.) <10 psu in single freshet Blue Catfish Ictalurus furcatus Winter - Spring during seasons Low Flow-High Salinity Indicators Summer – Fall Mantis shrimp Squilla empusa >25 psu Summer – Fall Pinfish Lagodon rhomboids >25 psu Oyster Indicators American Oyster 10-20 Summer - Fall Crassostrea virginica
1995 - Bottom-up water planning 2000 - Environmental water rights application 2007 - Bottom-up environmental flow planning 2021 - Environmental flow standards adaptive management?
Environmental flow analysis “…process for predicting … response of an ecosystem to changes in … flows or freshwater inflows.”
Species Area Maps
Bay and Estuary – Freshwater Inflow Indicator Selection Flows to meet desired conditions 1. 3. salinity range • Interpretation 4. geographic area • Salinity Model 2.
Description not Prescription Does not create a new ecosystem Not values that should never be changed
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