Caption:  This chart table "fdchelen.dbf" is based on U.S. Geologic Survey data from the North Fork Trinity River at Helena. The data were assembled and interpreted in Excel by McBain and Trush and data in this Chart Table was extracted from a spreadsheet entitled dhelena.xls. The duration curve was based on average daily flow data in cfs for is the water years 1912 and 1913 and from 2/1/57 to 9/30/80.

 50 rows of a possible 94 have been displayed.

DISCHARGE	RANK	PCTGREATER
19000	1	0.0001
3150	100	0.0107
2170	200	0.0213
1730	300	0.032
1490	400	0.0427
1340	500	0.0533
1220	600	0.064
1130	700	0.0747
1050	800	0.0853
992	900	0.096
937	1000	0.1067
896	1100	0.1173
854	1200	0.128
818	1300	0.1387
781	1400	0.1493
744	1500	0.16
713	1600	0.1707
682	1700	0.1814
658	1800	0.192
632	1900	0.2027
608	2000	0.2134
586	2100	0.224
566	2200	0.2347
546	2300	0.2454
526	2400	0.256
513	2500	0.2667
497	2600	0.2774
484	2700	0.288
471	2800	0.2987
457	2900	0.3094
446	3000	0.32
430	3100	0.3307
416	3200	0.3414
400	3300	0.352
392	3400	0.3627
380	3500	0.3734
369	3600	0.384
356	3700	0.3947
345	3800	0.4054
330	3900	0.416
320	4000	0.4267
308	4100	0.4374
297	4200	0.448
284	4300	0.4587
272	4400	0.4694
260	4500	0.4801
248	4600	0.4907
236	4700	0.5014
224	4800	0.5121
213	4900	0.5227