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USGS1951

Flood of August 4-5, 1943, in central West Virginia, with a summary of flood stages and discharges in West Virginia

During the night of August 4-5, 1943, a violent, thunderstorm of unusual intensity occurred in parts of Braxton, Calhoun, Gilmer, Ritchie, and Wirt Counties in the Little Kanawha River Basin in central West Virginia. Precipitation amounted to as much as 15 inches in 2 hours in some sections. As a result, many small streams and a reach of the Little Kanawha River in the vicinity of Burnsville and Gilmer reached the highest stages known. Computations based on special surveys made at suitable sites on representative small streams in the areas of intense flooding indicate that peak discharges closely approach 50 percent of the Jarvis scale. Twenty-three lives were lost on the small tributaries as numerous homes were swept away by the flood, which developed with incredible rapidity during the early morning hours. Damage estimated at $ 1,300,000 resulted to farm buildings, crops, land, livestock, railroads, highways, and gas- and oil-producing facilities. Considerable permanent land damage resulted from erosion and deposition of sand and gravel.

West Virginia↗
USGS1952

Ground-water resources of Snohomish County, Washington

Snohomish County comprises an east-west strip, six townships wide, extending 60 miles from the eastern shore of Puget Sound to the drainage divide of the Cascade Mountains. Topographically, the eastern two-thirds of the county varies frown hills and low mountain spurs at the west to the continuous high, maturely carved mountains of the Cascade Range at the east. The western third of the county lies in the Puget Sound lowland section: it is made up largely of unconsolidated deposits, as contrasted with the hard rocks of the mountain section. High-level deposits of glacial debris in some places form a transitional ramp from the lowlands to the mountain topography; in other places the transition is abrupt. The principal rivers--the Snohomish, Skykomish, Stillaguamish, and Sauk--drain westward and northwestward to Puget Sound. The Puget Sound lowland, with its extensions up the river valleys, is economically the important part. of the county. Within that part., ground-water development is of particular importance. The climate is equable and dominantly oceanic, with an average of about 32 h. of rainfall annually, but with a pronounced dry season from June to September. A mean annual temperature of 52 F, a growing season of more than 200 days, and a variety of good soils form a setting in which supplemental irrigation can at least double the average crop production. Within the coastal lowland, plateau segments 200 to 600 ft or more in altitude are separated by flat-bottomed, alluviated river gorges. The river flats in some eases represent the surface of as much as 500 to 600 ft of glacial and alluvial deposits backfilled into canyonlike arms of the aneestral drainage system. The plateau segments are formed of the till-smoothed remnants of bedrock or the tabular segments of Pleistocene deposits. The Pleistocene deposits consist, above sea level, of about 200 ft of Admiralty clay and as much as 1,000 ft of deposits of the Vashon glaciation. The latter include as much as 300 ft of either clay or sand units of advance outwash, up to 150 ft of till, and variable thicknesses of outwash-terrace and train material. The Admiralty clay is composed largely of clayey materials without important quantities of ground water. Similar clayey sediments are known to continue downward for more than 1,000 ft below sea level. The sand unit and, to a lesser extent, the clay unit, are largely advance outwash of the Vashon glaciation. They are water bearing, and the position of their ground-water reservoirs--in flat-shaped bodies perched on the Admiralty clay beneath the plateau surfaces and slopes--makes them particularly susceptible to useful development. The till is a persistent ground-moraine deposit that mantles most of the area of the plateau segments and passes beneath much of the outwash and alluvium of the valleys. The till is a great vaster of precipitation; it. sheds off to the creeks much water that would otherwise recharge the ground-water reservoirs. A small amount of water percolates irregularly into and through the till or accumulates in the soil zones on top, where it is tapped by a great many 'hardpan' wells of small yield. Outwash terraces of gravels and sands, where they lie below the local water table, carry large quantities of ground water. The alluvial materials of the river valleys are good aquifers, but the water is iron bearing in many places and is saline in places in the lower parts of the Snohomish and Stillaguamish Valleys. At present, no good aquifers are known to exist in the bedrock formations. The metamorphic, granitic, and volcanic rocks of the mountainous parts of the county are largely nonpermeable. The Tertiary strata, which underlie the coastal lowland at depth and crop out about its inner margin, contain little or no water, and that which is present is usually of poor quality. The chemical quality of the ground waters is in general excellent. The iron- bearing water of the alluvial valleys is the princ

Water Supply Paper↗
USGS1951

Missouri River basin floods of April-May 1950 in North and South Dakota

In area coverage and magnitude of peak discharge the floods of April-May 1950 in the Missouri River Basin in North and South Dakota were unprecedented in the area. These floods were characterized by an extremely late spring breakup of ice, by great flood peaks resulting from snow melt, and by two separate floods in the James River Valley in less than a month. The primary cause of the floods was the rapid melting of the season's great accumulation of snow, one of the deepest on record. In the period between the normal spring breakup time and the actual breakup of river ice, considerably more snow accumulated. Some of this was melted by a few warm days and the melt was stored as water behind snow barriers in upland watercourses. A sudden increase in temperature beginning April 13 and lasting until most of the snow had been converted into runoff resulted in rapid rise of flood waters. Tributary flood waters made the Missouri River from Mobridge to Yankton, S. Dak., rise to near the maximum recorded discharge. At Sioux City, Iowa, the 1950 flood peak-discharge exceeded any previously recorded by the Geological Survey. The center of the flooded area west of the Missouri River lay in the Cannonball River Basin which had the greatest water content of snow on the ground just before the ice broke up Floods north and south of this area were relatively less intense. Scattered records of the Cannonball River and a study of newspaper accounts and other information show that the flood of 1950 was greatest since the area was settled. Flooding of the James River at Jamestown was the greatest since 1897, and the floods of April and May 1950 were of nearly the same stage. Itemized flood damages were made by Federal and State agencies, and relief was sent to the area by the Department of the Army and the American National Red Cross. Data include records of stage and discharge at 54 gaging stations for the period of flood, a summary of peak discharges and comparative data for past and present maxima, a table of crest stages, and weather associated with the 1950 flood.

North Dakota, South Dakota↗
USGS1952

Flood of August 1950 in the Waimea area, Kauai, Hawaii

On August 15-18, 1950, Waimea River on the island of Kauai, T. H., had one of the severest floods in its history as a result of torrential rains, caused by a storm associated with the only typhoon ever recorded in the proximity of the Hawaiian Archipelego. At one rainfall station in the basin, 50 inches of rain was recorded during a 72- hour period. Kawaikoi Stream, in the headwaters of Waimea River basin, reached a maximum discharge of 7, 980 second-feet, or 1,950 second-feet per square mile. A rubble wall along the right bank of Waimea River just below the mouth of Makaweli River, constructed to contain the flow, was overtopped and the entire town of Waimea was flooded. The water was about a foot over the top of the wall at most places. No lives were lost, but damage to property was about $200, 000. This report presents detailed records of stages and discharges at four gaging stations in the basin during the flood period August 15-18 in the Waimea River basin, a summary of flood discharges at gaging stations on the principal streams on the island of Kauai, a description of the physical features of the drainage basin, a description of the two types of storms that prevail on the Hawaiian Islands, and a section on the meteorology of the storm of August 15-18. Figure 46 is a map of the island of Kauai, which shows the location of the gaging stations referred to in this report, the location of .rain gages in the area where rainfall was the greatest, and lines of equal rainfall for the period August 14-19, 1950.

Hawaii↗
USGS1953

Floods of May-July 1950 in southeastern Nebraska

Four floods occurred in southeast Nebraska during the period of May to July 1950. Two of these were the greatest known in the State if the size of the drainage areas is considered, and the other two were not so spectacular but were of notable size and of possible hydrologic significance in their relation to the two major floods. Although property loss and damage have been exceeded in previous floods in Nebraska, notably in the flood of May-June 1935 on the Republican River, they were extremely high in the period covered by this report. Loss of life, which resulted largely from the rapid cresting of the streams, was likewise high. Each of the floods was caused by heavy precipitation, which at times reached intensities seldom recorded in the Missouri River basin. On May 8, 1950, more than 14 inches of rain fell over certain areas of the Little Nemaha River basin within a period of a few hours. One center of the storm of July 8, 1950,occurred at York, Nebr., where 11 inches of rain was recorded within a 4-hour period, and the storm total exceeded 13 inches. Notable high rates of discharge produced by the intense rainfall were 1,030 cfs per square mile from 218 square miles of drainage area in the Little Nemaha River basin on May 9, 1950; 1,020 cfs per square mile from 2.5 square miles drainage area in the Elkhorn River basin on June 2, 1950; and 3,320 cfs per square mile from 6.93 square miles of drainage area in the Big Blue River basin on July 9, 1950. This report presents records of stage and discharge for the flood. periods at 36 stream-gaging stations in southeast Nebraska, and a summary of peak discharges, with comparative data for previously known floods at 45 measurement points. The report also includes a discussion of the weather associated with the floods and other data pertinent to the floods.

Water Supply Paper↗
USGS1953

Floods of November-December 1950 in the Central Valley basin, California

The flood of November-December 1950 in the Central Valley basin was the greatest in most parts of the basin since the turn of the century and probably was exceeded in the lower San Joaquin River basin only by the historic flood of 1862. In respect to monetary loss, the 1950 flood was the most disastrous in the history of the basin. Loss of life was remarkably small when one considers the extensive damage and destruction to homes and other property, which is estimated at 33 million dollars. Outstanding features of the flood were its unprecedented occurrence so early in the winter flood season, its magnitude in respect to both peak and volume in most major tributaries, and the occurrence of a succession of near-peak flows with a period of three weeks. The flood was caused by a series of storms during the period November 16 to December 8, which brought exceptionally warm, moisture-laden air inland against the Sierra Nevada range and caused intense rainfall, instead of snowfall, at unusually high altitudes. Basin-wide totals of rainfall during the period ranged from 30 inches over the Yuba and American River basins to 13 inches over the upper Sacramento and Feather River basins. Based on continuous records of discharge on major tributaries for periods ranging from 22 to 55 years and averaging about 43 years, the 1950 flood peaks were the greatest of record on the American, Cosumnes, Mokelumne, Stanislaus, Tuolumne, Merced, Chowchilla, Fresno, lower San Joaquin, Kings, Kaweah, Tule, and Kern Rivers. Second highest peak of record occurred during the flood of March 1928 on the Yuba, American and Mokelumne Rivers; the flood of Marcn 1940 on Cosumnes River; the flood of January 1911 on the Stanislaus and Tuolumne Rivers; the flood of December 1937 on the Merced, Kings, and Kaweah Rivers; the flood of March 1938 on the Chowchilla, Fresno, and lower San Joaquin Rivers; and the flood of March 1943 on the Tule and Kern Rivers. Peak discharges for 1950 did not exceed previous maxima on Bear, Yuba, Feather, and upper Sacramento Rivers, nor on west side tributaries of lower Sacramento River, Calaveras River, and upper San Joaquin River (above Friant Reservoir). Notable high rates of discharge were 354 cfs per square mile from 39.5 square miles in North Fork of Middle Fork Tule River, 225 cfs per square mile from 198 square miles in Rubicon River, 115 cfs per square mile from 999 square miles in North Fork of American River and 93.7 cfs per square mile from 1,921 square miles in American River at Fair Oaks. This report presents a general description of the 1950 flood, details and estimates of the damage incurred, records of stage and discharge for the period of the flood at 171 stream-gaging stations, records of storage in 14 reservoirs, a summary of peak discharges with comparative data for previous floods at 252 measurement points, and tables showing crest stages along the main stem and major tributary channels of the Sacramento and San Joaquin Rivers. The report also includes a discussion of meteorologic and hydrologic conditions associated with the flood, examples of the flood regulation afforded by storage reservoirs, a brief study of runoff characteristics, and a summary and comparison with previous floods in the Central Valley basin.

California↗
USGS1954

Floods of November-December 1950 in western Nevada

Record-breaking floods in the Walker, Carson, and Truckee River basins during November and December 1950 resulted from a rapid sequence of storms and unseasonably high temperatures that melted most of the early snow cover. During the period November 13 to December 8, 1950, total precipitation ranged from about 5 inches at the foot of the Sierra Nevada in Nevada to about 30 inches at the crest in California, near the California-Nevada State line. About half of this total occurred during the period November 16-21. The resulting floods were the greatest in more than 50 years of record. The highest discharge occurred on Truckee River where the greatest damage potential exists?in the urban area of Reno and Sparks. Notable rates of discharge were 19,900 cfs, or 36.1 cfs per square mile, from 551 square miles in Truckee River at Reno, Nev.; 7,010 cfs, or 212 cfs per square mile, from 33 square miles in Little Truckee River near Hobart Mills, Calif.; and 3,570 cfs, or 119 cfs per square mile, from 30 square miles in East Fork Carson River near Markleeville, Calif. The estimate of damages compiled by the Corps of Engineers total $4,360,000 for the area; $1,982,000 of this was for Reno. Two deaths were reported. The American Red Cross assisted about 200 persons, at an expenditure of about $7,500. Federal aid for city and county rehabilitation in Nevada totaled $75,000. This report contains records of stage and discharge at 20 gaging stations and contents of 2 reservoirs, and a summary of peak discharges at 23 points within or adjacent to the flood area. The report contains also a discussion of the storms and floods, a section on meteorology prepared by the Weather Bureau, and a brief discussion of previous floods.

Water Supply Paper↗