Observations and Experiments on the Fluctuations in the Level and Rate of Movement of Ground-water on the Wisconsin Agricultural Experiment Station Farm and at Whitewater, Wisconsin |
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80 days air barometer amplitude apparatus artesian artesian basin atmospheric pressure August Barome Barometer rising barometric changes capillary action capillary water cause change in temperature change of level changes in soil contour map cubic feet cubic foot cylinder decrease depth diameter discharged 1103.09 cubic distance diurnal changes diurnal oscillations downward due to percolation falling barometer fell during 80 flow of water foot gradient ground ground-water surface higher lands hydrostatic pressure increase influence instrument July July 18 July 25 June 19 June 27 Lake Mendota level of ground-water level of water low lands lower mean daily rate mean fall micrometer natural subirrigation nearly non-capillary spaces observations occurred October period Plate pumping rain rainfall rate of discharge rate of flow referred reservoir rise and fall sand season self-recording semi-diurnal September shown in Fig soil temperature standing water surface of ground-water Synchronous tile drains tion tube water surface water-level