In Germany, the use of water per person is 150 l a day. The authors classify water as in the pores, cracks, and in karst, and use an example in the foreland of the Harz to examine karst water. Karst water is not filtered by the rocks, they describe the Innerste Basin and its geology, and deal with the Kirschensoog Spring. They proceed to the problem of North German karst water (fertilizers,
... [Show full abstract] chemical firms making fertilizers), the waterworks have a difficult task and would like to know the proportion of nitrate pollution from each source. -D.J.Davis