These ETJ boundaries are updated an average of 1-3 business days after an ordinance has been passed by City Council that warrants an ETJ boundary change. This layer was originally created and maintained by a 3rd party consulting firm, but is currently maintained and updated by the City of Cibolo GIS team. Boundaries are drawn along parcel boundaries which are maintained by the Guadalupe County Appraisal District, or following metes and bounds written by a professional engineer. For reference only. Projected Coordinate System: NAD_1983_StatePlane_Texas_South_Central_FIPS_4204_Feet

The Sea Level Affecting Marshes Model (SLAMM) simulates the dominant processes involved in wetland conversions and shoreline modifications during long-term sea level rise. Map distributions of wetlands are predicted under conditions of accelerated sea level rise.

Tidal marshes are among the most susceptible ecosystems to climate change, especially accelerated sea-level rise (SLR). The Intergovernmental Panel on Climate Change (IPCC) Special Report on Emissions Scenarios (SRES) suggested that global sea level will increase by approximately 30 cm to 100 cm by 2100 (IPCC 2001). Rahmstorf (2007) suggests that this range may be too conservative and that the feasible range by 2100 is 50 to 140 cm. Rising sea levels may result in tidal marsh submergence (Moorhead and Brinson 1995) and habitat migration as salt marshes transgress landward and replace tidal freshwater and irregularly-flooded marsh (R. A. Park et al. 1991).

The model used the 1/1.5/2 meter of sea-level rise by 2100 scenario and was produced for the Nature Conservancy by Warren Pinnacle Consulting, Inc. The purpose of this series of maps was to show how marshes are predicted to migrate inland due to increases in sea level by 2100. The SLAMM model produced landcover maps for 5 points in time for this specific sea level rise scenario, which included actual landcover maps from either 2004 or 2009 and predicted landcover maps for 2025, 2050, 2075 and 2100 for each project site.

Impacts of Sea-level Rise, Habitat Conservation & Spatial Data Platform Project in Northern Gulf of Mexico

Contact detail for the project: The Nature Conservancy

Jorge Brenner, Ph.D. Associate Director of Marine Science The Nature Conservancy of Texas 205 N. Carrizo St. Corpus Christi, Texas 78401 Phone: (361) 882-3584; ext: 104 Email: jbrenner@tnc.org

The Sea Level Affecting Marshes Model (SLAMM) simulates the dominant processes involved in wetland conversions and shoreline modifications during long-term sea level rise. Map distributions of wetlands are predicted under conditions of accelerated sea level rise.

Tidal marshes are among the most susceptible ecosystems to climate change, especially accelerated sea-level rise (SLR). The Intergovernmental Panel on Climate Change (IPCC) Special Report on Emissions Scenarios (SRES) suggested that global sea level will increase by approximately 30 cm to 100 cm by 2100 (IPCC 2001). Rahmstorf (2007) suggests that this range may be too conservative and that the feasible range by 2100 is 50 to 140 cm. Rising sea levels may result in tidal marsh submergence (Moorhead and Brinson 1995) and habitat migration as salt marshes transgress landward and replace tidal freshwater and irregularly-flooded marsh (R. A. Park et al. 1991).

The model used the 1/1.5/2 meter of sea-level rise by 2100 scenario and was produced for the Nature Conservancy by Warren Pinnacle Consulting, Inc. The purpose of this series of maps was to show how marshes are predicted to migrate inland due to increases in sea level by 2100. The SLAMM model produced landcover maps for 5 points in time for this specific sea level rise scenario, which included actual landcover maps from either 2004 or 2009 and predicted landcover maps for 2025, 2050, 2075 and 2100 for each project site.

Impacts of Sea-level Rise, Habitat Conservation & Spatial Data Platform Project in Northern Gulf of Mexico

Contact detail for the project: The Nature Conservancy

Jorge Brenner, Ph.D. Associate Director of Marine Science The Nature Conservancy of Texas 205 N. Carrizo St. Corpus Christi, Texas 78401 Phone: (361) 882-3584; ext: 104 Email: jbrenner@tnc.org