Daily discharge, in second-feet, of Kinderhook Creek at Rossman, N. Y., for the year ending September 30, 1914 NOTE. Daily discharge not given when it comes below 100 second-feet. See "Special study " in station description. Monthly discharge of Kinderhook Creek at Rossman, N. Y., for the year ending September 30, 1914 [Drainage area, 331 square miles] NOTE. Mean discharge estimated by comparison with nearby streams as follows: January 13 to 27, 269 second-feet; February 17 to 28, 173 second-feet; March 1 to 7, 853 second-feet. DELAWARE RIVER DRAINAGE BASIN General Features The headquarters of Delaware river are found in Delaware, Greene, and Schoharies counties, N. Y. The East branch, which may be considered the main stream, rises at Grand Gorge in northeastern Delaware county; the West branch has its source in a small lake almost on the line of Schoharie and Delaware counties, at an elevation of 1,886 feet above sea level; the two streams unite at Hancock. From this junction point the river flows southeastward until it reaches Port Jervis, where it turns to the southwest and flows for a distance of about 40 miles along the base of the Shawangunk range until it passes through the water gap, from which point it flows in an irregular southerly direction to Trenton. Below Trenton its course is in general southwestward to Delaware bay. Between Hancock and Port Jervis it forms the dividing line between New York and Pennsylvania; south of Port Jervis it separates Pennsylvania from New Jersey and, for a few miles, Delaware from New Jersey. The drainage area of Delaware river, measured at Philadelphia and including that of Schuylkill river, is about 10,100 square miles, of which about 2,580 square miles lie in New York, 5,720 in Pennsylvania, and 1,800 in New Jersey. The river is tidal to Trenton, which lies also at the head of navigation. The Delaware receives a number of important tributaries, among which may be mentioned Mongaup and Neversink rivers and Callicoon creek from New York; Lackawaxen, Lehigh, and Schuylkill rivers and numerous creeks from Pennsylvania; and Rancocas creek, Musconetcong river, and Maurice river from New Jersey. EAST BRANCH OF DELAWARE RIVER AT FISH EDDY, N. Y. Location. At the highway bridge near New York, Ontario and Western Railway station at Fish Eddy, 52 miles above the confluence of the East and West branches of the Delaware river at Hancock. Records available.- November 19, 1912, to September 30, 1914. Gage.- Vertical staff, in two sections. Control.- Coarse gravel; apparently permanent. Discharge measurements.-At low stages made by wading; at high stages from the highway bridge. Winter flow.- Discharge relation seriously affected by ice. Frequent discharge measurements are necessary to obtain reliable records for frozen periods. Accuracy. Discharge rating curve fairly well defined. Co-operation. Established and maintained by the United States Geological Survey in co-operation with the State Engineer and Surveyor. Discharge measurements of East Branch of Delaware River at Fish Eddy, N. Y., during the year ending September 30, 1914 a Measurement made by wading 200 feet below gage. b Backwater from ice. Measurement made through ice 400 feet below gage. c Backwater from ice. Measurement made through ice about one-quarter mile below gage. d Measurement made by wading 300 feet below gage. Daily gage height, in feet, of East Branch of Delaware River at Fish Eddy, N. Y., for the year ending NOTE. Discharge relation affected by ice January 11 to March 26. Daily discharge, in second-feet, of East Branch of Delaware River at Fish Eddy, N. Y., for the year ending September 30, 1914 DAY Oct. Nov. Dec. Jan. Feb. Mar. April May June July Aug. Sept. NOTE.- Daily discharge values given during the period January 11 to March 26, inclusive, are only approximate. Daily discharge for periods of open water determined from a well-defined rating curve. New rating table used beginning March 27. Monthly discharge of East Branch of Delaware River at Fish Eddy, N. Y., for the year ending NOTE. Mean discharge estimated by comparison with West Branch of Delaware at Hale Eddy and Delaware at Port Jervis as follows: December 11 to 31, 1,600 second-feet; March 1 to 18, 462 second-feet; April 26 to May 9, 5,010 second-feet. DELAWARE RIVER AT PORT JERVIS, N. Y. Location. At the toll bridge at Port Jervis, 6 miles below the mouth of Mongaup river and 1 mile above the mouth of Neversink river, both entering from the north. Records available.— October 12, 1904, to September 30, 1914. Drainage area.— 3,250 square miles. (From U. S. Geological Survey water supply papers.) Gage. Standard chain, fastened to downstream side of bridge; read once daily. The elevation of the datum of the gage is 414.89 feet above the mean seal level. On June 20, 1914, the chain gage was replaced by a vertical staff gage attached to the wall about 30 feet downstream from the left abutment of the bridge. A sloping staff gage extends from the foot of the vertical gage (gage height 7.6) to a point below low water (gage height 0.5). Control.- Composed of gravel; probably permanent. Discharge measurements.— Made from the highway bridge, except at low stages, when the left channel is measured by wading. Winter flow.— Discharge relation is not greatly affected by ice, except during very cold winters. Ice jams sometimes occur at this station and the left channel is particularly subject to backwater from ice. Accuracy-Conditions of flow at this point are constant and a good dis charge rating curve has been developed for all stages. Careful comparison of records at this station with those obtained at Riegelsville and the two Hancock stations indicate that all the discharge data are reliable. Co-operation.-Gage heights furnished by the United States Weather Bureau. Discharge data obtained by the United States Geological Survey in co-operation with the State Engineer and Surveyor. Discharge measurements of Delaware River at Port Jervis, N. Y., during the year ending Daily gage height, in feet, of Delaware River at Port Jervis, N. Y., for year ending September |