SURFACE WATER QUANTITY 



Streamflow 



Streamflow in the Poplar River basin was below normal during 1984, 

 assuming the recorded flow of the Poplar River at the International 

 Boundary is a good indicator of basin runoff conditions. The March 

 to October recorded flow volume at that gauge was 8 790 cubic deca- 

 metres (dam ), or 53 percent of the 1931-83 average, and would have 

 been one of the lowest on record except for a single period of rain- 

 fall in June which produced about 2 800 dam of runoff. 



Dewatering operations at the Poplar River Mine have resulted in a 

 small quantity of water being discharged into Goose Creek, a tribu- 

 tary of the Poplar River. Little, if any, of this water reached the 

 International Boundary in 1984. 



The recorded flow volume of the East Poplar River at the Internation- 

 al Boundary for 1984 was 2 900 dam^, or 20 percent of the mean annual 

 flow since the completion of Morrison Dam in 1975. 



Minimum Flows 



The recorded runoff volume of the Poplar River at the International 

 Boundary from March 1 to May 31, 1984 was 5 480 dam . For the pur- 

 poses 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 



