Determine water holding capacity Key criteria: Soil depth and texture (Example for orientation) TextureDensity Water holding capacity (mm of water per soil cm) SSand1,350,70 SLSandy loam1,401,00 SCSandy clay1,501,35 LlS Light loamy sand1,501,20 LSloamy sand1,45 LmS Middle Loamy sand1,451,60 LSC Loam sandy clay1,501,65 LCS Loamy clay sand1,451,75 LIlight loam1,451,30 LmMiddle Loam1,351,75 LCLoamy clay1,401,95 CSClay sand1,551,70 CClay sand1,451,75 CLclay loam1,401,80 Source: Service de Cartographie des Sols de l Aisne Example: a) Determine texture - SC b) Determine soil depth – 100 cm Waterholding capacity estimate: 1,35 mm per cm of soil (SC) multiplied by cm soil depth (100 cm) Water holding capacity 135 mm Soils with water holding capacities > 120 mm have very low water contamination risk
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