Relations of Main-Stem Reservoir Operations and Specific Conductance in the Lower Arkansas River

Home Browse Search

Table 2. Step -trend results on the daily mean streamflow at station 07096000 (Arkansas River at Canon City) between 1964 -74 and 1975 -94 [ft3 /s, cubic feet per second; N, number of values; p value is the significance level of the test; <, less than; NS, trend not statistically significant; I, statistically significant increasing trend; D, statistically significant decreasing trend] to statistically significant trend was defined as having a p value less than or equal to 0.05. 180,000 W LL 160,000 W rY U Q Z 140,000 W F- Q 120,000 W Cr O 0- 100,000 LL O W 80,000 J 0 J n 60,000 Z Z Q J Q O 40,000 F- 20,001963 1965 1970 1975 1980 1985 1990 1995 Figure 6. Total annual volume of water imported into the Arkansas River from the Colorado River Basin, 1964 -94. 14 Relations of Streamflow and Specific- Conductance Trends to Reservoir Operations in the Lower Arkansas River, Southeastern Colorado 1964 -74 1975 -94 Month Median Median p value Significancel streamflow N streamflow N (ft3/S) (n3/S) January 304 341 378 620 <0.01 I February 284 308 351 560 <01 I March 268 341 385 620 <0I I April 268 330 369 600 <.01 I May 874 341 792 620 .16 NS June 1,800 330 2,140 600 .04 I July 1,420 341 1,150 620 <01 D August 1,020 341 703 620 <.01 D September 380 330 369 600 .04 D October 232 341 329 620 <01 I November 344 330 425 600 <.01 I December 344 341 412 620 <.01 I to statistically significant trend was defined as having a p value less than or equal to 0.05. 180,000 W LL 160,000 W rY U Q Z 140,000 W F- Q 120,000 W Cr O 0- 100,000 LL O W 80,000 J 0 J n 60,000 Z Z Q J Q O 40,000 F- 20,001963 1965 1970 1975 1980 1985 1990 1995 Figure 6. Total annual volume of water imported into the Arkansas River from the Colorado River Basin, 1964 -94. 14 Relations of Streamflow and Specific- Conductance Trends to Reservoir Operations in the Lower Arkansas River, Southeastern Colorado