Sacramento National Wildlife Refuge

Location:California, United States
IUCN Category:IV
Area:11,010 acres (4,456 hectares)
Species:All  Endangered  Invasive
Website:View website
Climate:View Climate Data
Land Use:View Land Use Data
Köppen climate classification:Csa (Climate: warm temperate; Precipitation: summer dry; Temperature: hot summer)

Ecoregions

California Central Valley grasslands

Soils

Link to Map
Protected Area Boundary
 AB
   
Share60 %30 %10 %60 %20 %20 %
Soil TypeEutric FluvisolsChromic LuvisolsHumic GleysolsChromic LuvisolsEutric RegosolsLithosols
Topsoil TextureMediumMediumMediumMediumMediumMedium
Reference Depth100 cm100 cm100 cm100 cm100 cm10 cm
DrainagePoorModerately wellPoorModerately wellModerately wellImperfectly
Available Water Capacity150 m150 m150 m100 m150 m15 mm
Phase 1   Stony  
Topsoil Properties
Gravel4 %9 %4 %9 %27 %26 %
Sand39 %47 %33 %47 %47 %43 %
Silt41 %29 %45 %29 %34 %34 %
Clay20 %24 %22 %24 %19 %23 %
USDA TextureLoamLoamLoamLoamLoamLoam
Reference Bulk Density1.41 g/cm³1.39 g/cm³1.38 g/cm³1.39 g/cm³1.43 g/cm³1.39 g/cm³
Bulk Density1.36 g/cm³1.54 g/cm³1.2 g/cm³1.54 g/cm³1.21 g/cm³1.3 g/cm³
Organic Carbon0.9 %0.86 %3.71 %0.86 %0.97 %1.4 %
PH7.36.45.56.46.47.6
Clay Cation Exchange Capacity62 cmol kg⁻¹38 cmol kg⁻¹33 cmol kg⁻¹38 cmol kg⁻¹41 cmol kg⁻¹42 cmol kg⁻¹
Soil Cation Exchange Capacity16 cmol kg⁻¹12 cmol kg⁻¹18 cmol kg⁻¹12 cmol kg⁻¹12 cmol kg⁻¹15 cmol kg⁻¹
Base Saturation91 %89 %34 %89 %79 %100 %
Total Exchangeable Bases16.4 cmol kg⁻¹10 cmol kg⁻¹3.1 cmol kg⁻¹10 cmol kg⁻¹15.1 cmol kg⁻¹15.6 cmol kg⁻¹
Calcium Carbonate1 %0 %0 %0 %0 %3.9 %
Calcium Sulphate0 %0 %0 %0 %0 %0 %
Exchangeable Sodium2 %1 %2 %1 %1 %4 %
Electrical Conductivity0.1 dS m-10.1 dS m-10.1 dS m-10.1 dS m-10.1 dS m-10.1 dS m-1
Subsoil Properties
Gravel8 %8 %5 %8 %28 % 
Sand41 %39 %37 %39 %50 % 
Silt38 %27 %35 %27 %32 % 
Clay21 %34 %28 %34 %18 % 
USDA TextureLoamClay loamClay loamClay loamLoam 
Reference Bulk Density1.4 g/cm³1.33 g/cm³1.35 g/cm³1.33 g/cm³1.44 g/cm³ 
Bulk Density1.39 g/cm³1.52 g/cm³1.46 g/cm³1.52 g/cm³1.46 g/cm³ 
Organic Carbon0.4 %0.38 %0.69 %0.38 %0.4 % 
PH7.56.35.66.36.9 
Clay Cation Exchange Capacity58 cmol kg⁻¹40 cmol kg⁻¹41 cmol kg⁻¹40 cmol kg⁻¹55 cmol kg⁻¹ 
Soil Cation Exchange Capacity14 cmol kg⁻¹15 cmol kg⁻¹11 cmol kg⁻¹15 cmol kg⁻¹11 cmol kg⁻¹ 
Base Saturation97 %93 %62 %93 %85 % 
Total Exchangeable Bases15.1 cmol kg⁻¹12.3 cmol kg⁻¹9 cmol kg⁻¹12.3 cmol kg⁻¹10.3 cmol kg⁻¹ 
Calcium Carbonate3.9 %0 %0 %0 %0.1 % 
Calcium Sulphate0 %0 %0 %0 %0 % 
Exchangeable Sodium3 %1 %4 %1 %2 % 
Electrical Conductivity0.1 dS m-10.1 dS m-10.1 dS m-10.1 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