addressing climate change adaptation in regional transportation plans

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Cal-Adapt ProjectionsTable 5. Summary of Cal-Adapt Climate Projections for the North RegionEffectTemperatureChange, 1990-2100RangesJanuary average temperature increase of 0.5°F to 4°F by 2050 and 3°F to 6°F by 2100.July average temperature increase 3°F to 5.5°F by 2050 and 8°F to 10°F by 2100, with largertemperature increases in the mountainous areas in the northeastern portion of the region.(Modeled high temperatures – average of all models; high carbon emissions scenario)PrecipitationHeat WaveSnowpackWildfire RiskAnnual precipitation is projected to decline by approximately an inch by 2050 and 2 inches by2100 for most of the region.(CCSM3 climate model; high carbon emissions scenario)Heat wave is defined as five days above a temperature between 89°F and 99°F dependingon location. By 2050 there is projected to be two to four more heat waves than 2010.Projected heat wave occurrence in 2100 is variable depending on location, between six and15 per year.March snowpack disappears by 2090 for most of the region with the exception of areas nearMt. Shasta.(CCSM3 climate model; high carbon emissions scenario)Substantial increases in the likelihood of wildfires are projected in most of the region,especially in Shasta and Siskiyou counties where risks may be multiplied 6 to 14 times by theend of the century.(GFDL climate model; high carbon emissions scenario)[Public Interest Energy Research, 2011. Cal-Adapt. Retrieved from http://cal-adapt.org]Water SourcesThe North region overlaps portions of the Sacramento River, NorthernLahontan, and North Coast hydrologic regions as defined by the CaliforniaDepartment of Water Resources (2009). Water supply relies on a mix ofimported, regional surface water and groundwater resources for meetinglocal demand. Overdraft and illegal diversions create challenges for resourcemanagement in some areas, contributing to concerns about the preservationof aquatic and riparian habitats (DWR, 2009). Most of Shasta County, thesoutheastern corner of Siskiyou County, the central portions of Modoc County,and the northwestern area of Lassen County are located in the SacramentoRiver hydrologic region. In this region there is heavy reliance on groundwaterand on the surface water conveyance systems that provide much of the Deltainflow. The easternmost parts of Modoc County and much of Lassen County arelocated in the North Lahontan hydrologic region (DWR, 2009). The Susan Riverdrains the North Lahontan area and serves as a critical source of water. TrinityCounty, much of Siskiyou County, and the northwestern portions of ModocAPG: UNDERSTANDING REGIONAL CHARACTERISTICS PAGE 22
County are in the North Coast hydrologic region. Trinity Lake, located 40 milesnorthwest of Redding, is the largest reservoir in the North region, containing avolume of over 2.4 million acre-feet. This and other North Coast sources exportwater to the Sacramento River region via the Clear Creek Tunnel (DWR, 2009).The abundance of rivers and groundwater basins in the region allows for many ofthe small communities to rely on local resources to meet water demand.Biophysical CharacteristicsThe majority of the region is located between 3,000 and 12,000 feet above sealevel. Aquatic and riparian resources within the area include Goose Lake, ClearLake Reservoir, the Klamath River, the Pit River, Shasta Lake, the SacramentoRiver, Eagle Lake, and Honey Lake (DWR, 2009). Natural vegetation differsbased on location within the region. The southwestern portion of the regionis characterized by oak, pine, mixed-conifer, and hardwood-conifer forestsaccompanied by mixed chaparral and low sage (FRAP, 1998). Areas in Lassenand Modoc counties offer habitat characterized by Joshua trees and juniperwoodland, perennial grassland, wetland meadows, and freshwater emergentwetlands (DWR, 2007). The Modoc Plateau and dependent species are decliningdue to excessive grazing and invasive species.Regional Entities• Air Districts: Lassen, Modoc, North Coast Unified, Shasta, Siskiyou• Regional Organizations: Lassen County Transportation Commission,Modoc County Local Transportation Commission, Shasta County RegionalTransportation Planning Association, Trinity County TransportationCommission• Tribal Lands (U.S. EPA, 2011): Alturas, Big Bend, Cedarville, Fort Bidwell,Karuk, Likely, Lookout, Montgomery Creek, Quartz Valley, Redding, RoaringCreek, Round Valley, Susanville, XL RanchPAGE 23APG: UNDERSTANDING REGIONAL CHARACTERISTICS
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Addressing Climate Change Adaptatio
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appendix b reportState-of-the-Pract
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State-of-the-Practice Climate Chang
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State-of-the-Practice Climate Chang
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Page 185 and 186: C A L I F O R N I AADAPTATIONPLANNI
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Page 190 and 191: Adaptation Planning Guide - Advisor
Page 192 and 193: List of Tables (cont’d.)Table 6.
Page 194 and 195: Climate Impact RegionsThe APG is or
Page 196 and 197: APGSTART HERE:PLANNING FOR ADAPTIVE
Page 198 and 199: What are the designated climate imp
Page 200 and 201: CA Climate Adaptation Planning Guid
Page 206 and 207: • Selected Demographic Data. Sele
Page 208 and 209: Cal-Adapt ProjectionsTable 1. Summa
Page 210 and 211: Selected Infrastructure and Regiona
Page 212 and 213: illnesses due to air pollution resu
Page 214 and 215: Additional Resources• Sea level r
Page 220 and 221: frequency can harm forests. Large i
Page 222 and 223: Bay Area RegionCounties: Alameda, C
Page 224 and 225: the Sacramento and San Joaquin rive
Page 226 and 227: Table 12. Selected Population Data
Page 228 and 229: Sea level rise is also expected to
Page 230 and 231: Additional Resources• Public Heal
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Page 236 and 237: Table 16. Selected Population Data
Page 238 and 239: As with crops, climate change impac
Page 240 and 241: Additional Resources• Wildfire Re
Page 242 and 243: elevations, increased static levee
Page 244 and 245: The ecosystem functions of the Delt
Page 246 and 247: Setting and HistoryThe California D
Page 248 and 249: The islands in the lower Bay-Delta
Page 250 and 251: Some of the questions that should b
Page 252 and 253: Southern Central Valley RegionCount
Page 254 and 255: Biophysical CharacteristicsThe west
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Additional Resources• Sea Level R
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Cal-Adapt ProjectionsTable 29. Summ
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Selected Infrastructure and Regiona
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Timber practices have also had ecos
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Southeast Sierra RegionCounties: Al
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Biophysical CharacteristicsThe sout
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ultimately result in reduced water
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particular concern are populations
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Additional Resources• Sea Level R
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industry around Big Bear. As there
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California Natural Resources Agency
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