10 - 



Minimum Flows 



The recorded runoff volume of the Poplar River at the International 



Boundary from March 1 to May 31, 1985 was 6 890 dam^. For the purposes of 



interpreting the apportionment recommendations of the IJC, the recorded 



flow is assumed to be the natural flow. Based on these recommendations, 



this volume entitled the United States to a minimum discharge of 0.057 



cubic metre per second (m-^/s) from June 1 to August 31, 1985 and 



0.028 m3/s from September 1, 1985 to May 31, 1986 on the East Poplar River 



at the International Boundary. The minimum flow of 0.028 m^/s for the 



first 5 months of 1985 had previously been determined on the basis of the 



March 1 to May 31, 1984 Poplar River volume. 



The recorded flow of the East Poplar River at the International Boundary 

 exceeded the recommended minimum throughout the year. A minimum daily 

 discharge of 0.051 m^/s occurred on February 12. A hydrograph of flow in 

 the East Poplar River at the International Boundary and the minimum flow 

 as recommended by the IJC is shown in Figure 3. 



ApportioniRMt r*coaiin«ndatia)i for mini 



JAN I FEB I MAR | APR | MAY | JUNE | JULY I *U6 I SEPT I OCT I NOV I DEC 



Figure 3 - Hydrograph of Water Discharge of the East Poplar River at the 

 International Boundary and Recommended Minimum Flow. 



