Soil Rating – Leakwater Rate (SWR), Nationally Rated

The leachate rate is a characteristic for evaluating the soil as part of the water balance and describes the amount of water that the soil can no longer hold due to its limited water holding capacity and which therefore leaves or seeps the root space (groundwater formation). Lateral drainage (drainage, trench drainage) is not considered at this point. Sandy soils can hold less water than loamy or clay soils, so that (under otherwise equal conditions) the rate of leaching under sandy soils is greater than under loamy/tony soils. In rainy areas, more water leaks than in low-precipitation areas. The leachate rate evaluates a natural soil function in accordance with § 2(2) of the BBodSchG, namely in accordance with point 1.b) as part of the natural balance, in particular with its water and nutrient cycles. The criterion chosen for this purpose is the general water balance ratio with the characteristic value of leachate water rate. The maps are available for the following scale levels: — 1: 1,000 – 10.000 for high-resolution or parcel-sharp planning, – 1: 10.001 – 35.000 for municipal level planning, – 1: 35.001 – 100.000 for planning in larger regions, – 1: 100.001 – 350.000 for nationally differentiated planning, – 1: 350.001 – 1000.000 for nationwide to nationwide planning. In this illustration, the leachate rate is classified uniformly across the country. Under the title “Soil assessment – field capacity in the leach water rate (SWR), assessed regionally”, there is still a natural space-related classification of the leachate rate, which represents the leachate rate more regionally differentiated.