Quantitative investigations on the geoegrpahical neighbourhood of arable and surface water on example of the Federal States Schleswig-Holstein and Sachsen-Ahalt

摘要

Digital survey maps of the Federal States Schleswig-Holstein and Sachsen-Anhalt are randomly checked for the quantitative relationship between surface water and neighbouring arble land. The checks reveal highly significant differences in the mean Water index (bank length/arable land). They may also be inter- Preted as difference between the natural spaces used for arable Purposes. The sample are used to calculate by means of GIS Technology various scenarios for arable land adjoining water Bodies. In case of Schleswig-Holstein, a 50-m wide strip along Both sides of the running water bodies (rivers, brooks and canals) Covers 57, 154 ha arable land (95/100 confidence interval: 44, 502 To 69, 807 ha). This could be 30/100 of the arable land of a small Region. Possible economic loss is discussed in connection with The intended application of drinking water limits for plant pro- Tection products to surface water.