U.S. Geological Survey Presentation to the New York Drought Management Task Force September 3, 1999 Data-Collection Network Funded in Cooperation with other State, Federal, and local Agencies Web Page: ny.usgs.gov
Surface Water Conditions Gary Firda New York District Surface-Water Specialist
EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 93% 99% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 Monthly Streamflow at Selected Gaging Stations Through August 1999
EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 100%99% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 Monthly Streamflow at Selected Gaging Stations Through August 1999
Near Real-Time data at
EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 66%95% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 Monthly Streamflow at Selected Gaging Stations Through August 1999
EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 72%94% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 Monthly Streamflow at Selected Gaging Stations Through August 1999
EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 88% 95% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 Monthly Streamflow at Selected Gaging Stations Through August 1999
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 Monthly Streamflow at Selected Gaging Stations Through August 1999
Near Real-Time data at
EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 81%100% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 Monthly Streamflow at Selected Gaging Stations Through August 1999
EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 95%90% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 Monthly Streamflow at Selected Gaging Stations Through August 1999
EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 87%61% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 Monthly Streamflow at Selected Gaging Stations Through August 1999
Real-Time data at
EXPLANATION DISCHARGE, IN CUBIC FEET PER SECOND 99% Maximum / Minimum thru WY98 25 / 75% Exceedance thru WY98 Median thru WY98 Current mean monthly discharge 95% Exceedance thru WY98 Monthly Streamflow at Selected Gaging Stations Through August 1999
Streamflow Conditions for August 1999
Ground-Water Conditions John Williams New York District Ground-Water Specialist
Federal-State observation well network August
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 91%
Cu-10, Chautauqua 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 82%
C-102, Cortland 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 100%
St-40, St. Lawrence 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 38%
S8833, 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 83%
Federal-State observation well network August
About 1 mile downstream of Poughkeepsie’s Water- Supply Intakes. Salt-Front on 9/2/99 at about River-Mile 76.5 (+/- 1.2) Gaging Station Location Salt-Front Location in the Hudson River Sept. 2, 1999 Salt Front = 100 mg/L Chloride
Daily Average SW Data Through September 2, 1999 Estimated Daily Avg Flow for Hudson Green Island, IS EQUAL TO Cohoes plus Waterford 0 15,000 30,000 45,000 60, J F M A M J J A S O N D May Jun Jul Aug Sep 0 15,000
Daily Average SW Data Through September 2, J F M A M J J A S O N D Specific Conductance, in S/cm Hudson River Below Poughkeepsie (RM 72.3) 100 mg/L Chloride 250 mg/L Chloride
Near-Real-Time SW Data Through September 3, 1999
Daily Average SW Data Through September 2, 1999 J F M A M J J A S O N D Specific Conductance, in S/cm Hudson River at West Point (RM 51.6) 0 2,000 4,000 6,000 8,000 10,000 12,000
Location of Salt Front in Hudson River Through September 2, 1999 J Salt Front = 100 mg/L Chloride
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