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U.S. Geological Survey Presentation to the New York Drought Management Task Force September 3, 1999 Data-Collection Network Funded in Cooperation with.

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Presentation on theme: "U.S. Geological Survey Presentation to the New York Drought Management Task Force September 3, 1999 Data-Collection Network Funded in Cooperation with."— Presentation transcript:

1 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

2 Surface Water Conditions Gary Firda New York District Surface-Water Specialist

3 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

4 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

5 Near Real-Time data at http://ny.usgs.gov

6 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

7 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

8 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

9 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

10 Near Real-Time data at http://ny.usgs.gov

11 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

12 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

13 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

14 Real-Time data at http://ny.usgs.gov

15 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

16 Streamflow Conditions for August 1999

17 Ground-Water Conditions John Williams New York District Ground-Water Specialist

18 Federal-State observation well network August

19 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%

20 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%

21 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%

22 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%

23 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%

24 Federal-State observation well network August

25 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

26 Daily Average SW Data Through September 2, 1999 Estimated Daily Avg Flow for Hudson River @ Green Island, IS EQUAL TO Mohawk @ Cohoes plus Hudson @ Waterford 0 15,000 30,000 45,000 60,000 1995 1999 J F M A M J J A S O N D May Jun Jul Aug Sep 0 15,000

27 Daily Average SW Data Through September 2, 1999 0 200 400 600 800 1000 1200 1400 1600 1800 2000 J F M A M J J A S O N D 1995 1999 Specific Conductance, in  S/cm Hudson River Below Poughkeepsie (RM 72.3) 100 mg/L Chloride 250 mg/L Chloride

28 Near-Real-Time SW Data Through September 3, 1999

29 Daily Average SW Data Through September 2, 1999 J F M A M J J A S O N D 1995 1999 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

30 Location of Salt Front in Hudson River Through September 2, 1999 J Salt Front = 100 mg/L Chloride

31 Effects from Dennis? Forecast Moves Dennis Away From New York For Now...

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