Channel Islands National Park

Location:California, United States
IUCN Category:II
Area:139,010 acres (56,255 hectares)
Species:All  Endangered  Invasive
Website:View website
Climate:View Climate Data
Land Use:View Land Use Data
Köppen climate classification:Csb (Climate: warm temperate; Precipitation: summer dry; Temperature: warm summer)


California coastal sage and chaparral


Protected Area Boundary
Share70 %30 %
Soil TypeCalcaric RegosolsChromic Luvisols
Topsoil TextureMediumMedium
Reference Depth100 cm100 cm
DrainageImperfectlyModerately well
Available Water Capacity50 m150 m
Phase 1Lithic 
Topsoil Properties
Gravel17 %9 %
Sand43 %47 %
Silt35 %29 %
Clay22 %24 %
USDA TextureLoamLoam
Reference Bulk Density1.4 g/cm³1.39 g/cm³
Bulk Density1.4 g/cm³1.54 g/cm³
Organic Carbon0.77 %0.86 %
Clay Cation Exchange Capacity40 cmol kg⁻¹38 cmol kg⁻¹
Soil Cation Exchange Capacity17 cmol kg⁻¹12 cmol kg⁻¹
Base Saturation100 %89 %
Total Exchangeable Bases31.1 cmol kg⁻¹10 cmol kg⁻¹
Calcium Carbonate15 %0 %
Calcium Sulphate0 %0 %
Exchangeable Sodium2 %1 %
Electrical Conductivity0.3 dS m-10.1 dS m-1
Subsoil Properties
Gravel18 %8 %
Sand38 %39 %
Silt36 %27 %
Clay26 %34 %
USDA TextureLoamClay loam
Reference Bulk Density1.36 g/cm³1.33 g/cm³
Bulk Density1.52 g/cm³1.52 g/cm³
Organic Carbon0.53 %0.38 %
Clay Cation Exchange Capacity50 cmol kg⁻¹40 cmol kg⁻¹
Soil Cation Exchange Capacity15 cmol kg⁻¹15 cmol kg⁻¹
Base Saturation100 %93 %
Total Exchangeable Bases41.1 cmol kg⁻¹12.3 cmol kg⁻¹
Calcium Carbonate15 %0 %
Calcium Sulphate0 %0 %
Exchangeable Sodium1 %1 %
Electrical Conductivity0.3 dS m-10.1 dS m-1
Soil data provided by FAO/IIASA/ISRIC/ISSCAS/JRC, 2012. Harmonized World Soil Database (version 1.2). FAO, Rome, Italy and IIASA, Laxenburg, Austria.
Köppen climate classification provided by Kottek, M., J. Grieser, C. Beck, B. Rudolf, and F. Rubel, 2006: World Map of Köppen-Geiger Climate Classification updated. Meteorol. Z., 15, 259-263