Links

Wikipedia about buffer zones
http://en.wikipedia.org/wiki/Buffer_zone

The Danish AgriFish Agency about buffer zones (Danish)
http://naturerhverv.dk/landbrug/natur-og-miljoe/randzoner/

2nd International Interdisciplinary Conference on LAND USE AND WATER QUALITY:
Agricultural Production and the Environment
Vienna, Austria, 21-24 September 2015
http://web.natur.cuni.cz/luwq2015/

Monitoring of flow and water level in Spjald:
http://www2.dmu.dk/1_om_dmu/2_tvaer-funk/3_vap/spjald/index.html