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U.S. Geological Survey Presentation to the New York Drought Management Task Force August 10, 1999 Data-Collection Network Funded in Cooperation with other State, Federal, and local Agencies Web Page ny.usgs.gov
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Surface Water Conditions Gary Firda New York District Surface-Water Specialist Mohawk River at Cohoes, NY
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EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 93% 98% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 August Values Based on Average of First 8 Days Monthly Streamflow at Selected Gaging Stations
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EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 99%98% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 August Values Based on Average of First 8 Days Monthly Streamflow at Selected Gaging Stations
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EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 95%94% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 August Values Based on Average of First 8 Days Monthly Streamflow at Selected Gaging Stations
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EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 87% 92% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 August Values Based on Average of First 8 Days Monthly Streamflow at Selected Gaging Stations
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EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 100% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 August Values Based on Average of First 8 Days Monthly Streamflow at Selected Gaging Stations
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EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 90%100% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 August Values Based on Average of First 8 Days Monthly Streamflow at Selected Gaging Stations
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EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 100%93% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 August Values Based on Average of First 8 Days Monthly Streamflow at Selected Gaging Stations
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EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 89%63% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 August Values Based on Average of First 8 Days Monthly Streamflow at Selected Gaging Stations
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Streamflow Conditions for July 1999
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Streamflow Conditions for August 1-8, 1999
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About 5 miles downstream of Poughkeepsie’s Water- Supply Intakes. Salt-Front on 8/10/99 at about River-Mile 72 Gaging Station Location Salt-Front Location in the Hudson River Aug. 10, 1999
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Specific Conductance
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Location of Salt Front in Hudson River Data Through August 8, 1999
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Ground-Water Conditions John Williams New York District Ground-Water Specialist
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Du-1009, Dutchess County WATER LEVEL, IN FEET BELOW LAND SURFACE Maximum/Minimum thru WY98 75/25 % Exceedance thru WY98 90 % Exceedance thru WY98 95 % Exceedance thru WY98 Median thru WY98 Current water levels EXPLANATION Values through month of July
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A-636, Albany County WATER LEVEL, IN FEET BELOW LAND SURFACE Maximum/Minimum thru WY98 75/25 % Exceedance thru WY98 90 % Exceedance thru WY98 95 % Exceedance thru WY98 Median thru WY98 Current water levels EXPLANATION Values through month of July
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Wo-4, Wyoming County WATER LEVEL, IN FEET BELOW LAND SURFACE Maximum/Minimum thru WY98 75/25 % Exceedance thru WY98 90 % Exceedance thru WY98 95 % Exceedance thru WY98 Median thru WY98 Current water levels EXPLANATION Values through month of July
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Sb-472, Steuben County WATER LEVEL, IN FEET BELOW LAND SURFACE Maximum/Minimum thru WY98 75/25 % Exceedance thru WY98 90 % Exceedance thru WY98 95 % Exceedance thru WY98 Median thru WY98 Current water levels EXPLANATION Values through month of July
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S5517, Suffolk County WATER LEVEL, IN FEET BELOW LAND SURFACE Maximum/Minimum thru WY98 75/25 % Exceedance thru WY98 90 % Exceedance thru WY98 95 % Exceedance thru WY98 Median thru WY98 Current water levels EXPLANATION Values through month of July
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Federal-State observation well network Values through month of July
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