Lassen Volcanic National Park

Location:California, United States
IUCN Category:II
Area:29,388 acres (11,893 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)


Sierra Nevada forests


Protected Area Boundary
Share70 %30 %
Soil TypeOrthic AcrisolsHumic Cambisols
Topsoil TextureMediumMedium
Reference Depth100 cm100 cm
DrainageModerately wellModerately well
Available Water Capacity75 m150 m
Phase 1Stony 
Topsoil Properties
Gravel10 %8 %
Sand49 %41 %
Silt27 %36 %
Clay24 %23 %
USDA TextureSandy clay loamLoam
Reference Bulk Density1.4 g/cm³1.39 g/cm³
Bulk Density1.4 g/cm³1.1 g/cm³
Organic Carbon1 %2.72 %
Clay Cation Exchange Capacity16 cmol kg⁻¹54 cmol kg⁻¹
Soil Cation Exchange Capacity7 cmol kg⁻¹21 cmol kg⁻¹
Base Saturation44 %24 %
Total Exchangeable Bases3.5 cmol kg⁻¹5 cmol kg⁻¹
Calcium Carbonate0 %0 %
Calcium Sulphate0 %0 %
Exchangeable Sodium1 %1 %
Electrical Conductivity0.1 dS m-10.1 dS m-1
Subsoil Properties
Gravel10 %8 %
Sand40 %44 %
Silt24 %32 %
Clay36 %24 %
USDA TextureClay loamLoam
Reference Bulk Density1.32 g/cm³1.39 g/cm³
Bulk Density1.4 g/cm³1.16 g/cm³
Organic Carbon0.42 %1.03 %
Clay Cation Exchange Capacity14 cmol kg⁻¹38 cmol kg⁻¹
Soil Cation Exchange Capacity6 cmol kg⁻¹15 cmol kg⁻¹
Base Saturation32 %30 %
Total Exchangeable Bases2.3 cmol kg⁻¹2.5 cmol kg⁻¹
Calcium Carbonate0 %0 %
Calcium Sulphate0 %0 %
Exchangeable Sodium2 %2 %
Electrical Conductivity0.1 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