Streamflow Losses to Madison Group Rocks in the Little Belt and Big Snowy Mountains, Montana

摘要

Four streams originating in the Little Belt and Big Snowy Mountains in central Montana were measured at various times from May 4 to October 1, 1975, to determine flow losses as the streams cross outcrops of the Madison Group (Mississippian age). Based on the seepage measurements made during base-flow conditions, streamflow losses in the Middle Fork Judith River were 10.2 cubic feet per second. Based on streamflow data obtained for 39 months at two streamflow-gaging stations on the Middle Fork Judith River, the average daily loss was 9.1 cubic feet per second or about 6,600 acre-feet per year.