Survey Results

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OCWWS Survey

Survey Results

[ Results=20 as Table [?]=20 ] [ Export=20 Results to CSV [?]=20 ]

Results for Survey: Hydrology Forecast = Verification=20 Survey for RFC Workshop

=20 Questions marked with a [*]=20 were required.

=20 [?]=20

Survey Time Stats

Average Completion Time: 22min 19sec = (Min: 0min=20 0sec, Max: 79min 40sec)
Average Time before Quit: 25min 42sec =

This survey is designed to assist in = tailoring=20 NWS training for hydrologic forecast verification. This survey = should be=20 completed by all participants for the COMET advanced hydro science = course=20 as well as the RFC verification workshop. Individual survey = responses will=20 be anonymous. No personnel, either within the NWS or connected = with this=20 project, will have access to the individual survey responses. They = will=20 have access only to summaries of the survey = responses.

Finally,=20 please note that this survey is not a test of your intelligence or = knowledge about forecasting or verification. In some cases, it = asks for=20 your perspective about tools or approaches that have not yet been=20 implemented. Your responses are important because you are among = the few=20 professional active in operational hydrologic forecasting in the = U.S. Your=20 responses will be important in devising training, procedures, and = tools=20 for verifying hydrologic forecasts in ways that can assist = forecasters as=20 they are generating forecasts.

Section I. General = Information

In this=20 section, we ask some general questions that allow us to classify = the=20 survey results based on forecasting duties, forecaster background, = and=20 years of service.

1. Which statement best describes = your=20 hydrologic forecasting duties?
Please check only one=20 statement.

I am a full time hydrologic forecaster. I perform = hydrologic=20 forecasts on daily basis - 8 3D""=20

=20 50.00% I am a full time hydrometeorology forecaster (HAS) = forecaster - 1 3D""=20

=20 6.25% I supervise a group of forecasters - 3 3D""=20

=20 18.75% Other, Please specify below - 4 3D""=20

=20 25.00% Total Answers - 16

2. Other (from question 1): =

Total Answers - 4 [=20 View Answers ]

3. Which statement best describes = your=20 formal educational training?
Please check only one = statement.

Hydrologist - 4 3D""=20

=20 25.00% Meteorologist - 5 3D""=20

=20 31.25% Environmental Scientist/Engineer - 1 3D""=20

=20 6.25% Agricultural engineer - 0 3D""=20

=20 0.00% Civil Engineer - 3 3D""=20

=20 18.75% Other, Please specify below - 3 3D""=20

=20 18.75% Total Answers - 16

4. Other (from question 3): =

Total Answers - 3 [=20 View Answers ]

5. Please indicate the number of = years you=20 have been performing hydrologic forecasting duties.
Please = check one=20 statement only.

Less than one year - 0 3D""=20

=20 0.00% 2 to 5 years - 1 3D""=20

=20 6.25% 5 to 10 years - 3 3D""=20

=20 18.75% More than 10 years - 12 3D""=20

=20 75.00% Total Answers - 16

6. After you perform stream flow = forecast,=20 your stream flow forecasts are then:
Please check all that = apply.=20

Delivered directly to WFOs - 7 3D""=20

=20 13.46% Quality controlled at the RFC and then delivered directly = to=20 WFOs - 11 3D""=20

=20 21.15% Used by other forecasters for downstream forecasting - 6 3D""=20

=20 11.54% Published directly on the web - 13 3D""=20

=20 25.00% Used to write flood warning statements by WFO = personnel - 15 3D""=20

=20 28.85% Total Answers - 52

Section II. Deterministic Streamflow=20 forecasts

In this section we attempt to identify current=20 forecasting practices and to gauge your opinion about the = forecasting=20 tools. Please answer all questions with respect to deterministic=20 Streamflow forecasts only.

7. Do you perform hydrologic=20 forecasting?
Please check only one statement.

Yes, go to question 8 - 15 3D""=20

=20 93.75% No. Thank you for your participation. Please select = 'Finish' to=20 exit the survey. - 1 3D""=20

=20 6.25% Total Answers - 16

8. Please indicate the frequency = with which=20 you perform hydrologic forecasting.
Please check only one=20 statement.

More than once a week - 12 3D""=20

=20 80.00% About once a week - 2 3D""=20

=20 13.33% About once a month - 1 3D""=20

=20 6.67% Rarely (several times a year) - 0 3D""=20

=20 0.00% Total Answers - 15

9. Do you perform forecasts = for:
Please=20 check all that apply.

Complete forecast groups - 8 3D""=20

=20 29.63% Selected basins from different forecast groups - 4 3D""=20

=20 14.81% Both complete forecast groups and selected basins from = different=20 forecast groups - 8 3D""=20

=20 29.63% My forecast points change based on needs - 7 3D""=20

=20 25.93% Total Answers - 27

10. When conducting realtime = forecasting,=20 do you perform modifications (MODS)?
Please check only one=20 statement.

Yes, go to question 11 - 15 3D""=20

=20 100.00% No, go to question 28 - 0 3D""=20

=20 0.00% Total Answers - 15

11. Which types of MODS do you = usually=20 perform?
Please check all that apply.

MAP - 13 3D""=20

=20 14.29% Q input - 6 3D""=20

=20 6.59% Q output - 8 3D""=20

=20 8.79% MAT - 6 3D""=20

=20 6.59% UH - 12 3D""=20

=20 13.19% Baseflow - 10 3D""=20

=20 10.99% Soil Reservoir Capacities - 8 3D""=20

=20 8.79% Initial model states (carry-over) of the hydrologic model = used=20 by your RFC - 6 3D""=20

=20 6.59% SWE - 7 3D""=20

=20 7.69% Snow model melt factor - 7 3D""=20

=20 7.69% Others, Please specify below - 8 3D""=20

=20 8.79% Total Answers - 91

12. Others (from question 11): =

Total Answers - 12 [=20 View Answers ]

Whether you perform MODS or not, for = each of the=20 following types of modification, please indicate your likely = action if=20 observation and model output are not close enough. Please check = only one=20 choice for each Modification.

13. MAP

Most Likely - 10 3D""=20

=20 71.43% Will perform only if other MODS were not satisfactory - 4 3D""=20

=20 28.57% Never - 0 3D""=20

=20 0.00% Total Answers - 14

14. Q input

Most Likely - 1 3D""=20

=20 7.69% Will perform only if other MODS were not satisfactory - 9 3D""=20

=20 69.23% Never - 3 3D""=20

=20 23.08% Total Answers - 13

15. Q output

Most Likely - 3 3D""=20

=20 21.43% Will perform only if other MODS were not satisfactory - 8 3D""=20

=20 57.14% Never - 3 3D""=20

=20 21.43% Total Answers - 14

16. MAT

Most Likely - 4 3D""=20

=20 26.67% Will perform only if other MODS were not satisfactory - 4 3D""=20

=20 26.67% Never - 7 3D""=20

=20 46.67% Total Answers - 15

17. UH

Most Likely - 7 3D""=20

=20 46.67% Will perform only if other MODS were not satisfactory - 6 3D""=20

=20 40.00% Never - 2 3D""=20

=20 13.33% Total Answers - 15

18. Baseflow

Most Likely - 8 3D""=20

=20 53.33% Will perform only if other MODS were not satisfactory - 3 3D""=20

=20 20.00% Never - 4 3D""=20

=20 26.67% Total Answers - 15

19. Soil Reservoir Capacities =

Most Likely - 5 3D""=20

=20 33.33% Will perform only if other MODS were not satisfactory - 5 3D""=20

=20 33.33% Never - 5 3D""=20

=20 33.33% Total Answers - 15

20. Model States (Carryover) =

Most Likely - 3 3D""=20

=20 20.00% Will perform only if other MODS were not satisfactory - 8 3D""=20

=20 53.33% Never - 4 3D""=20

=20 26.67% Total Answers - 15

21. SWE

Most Likely - 4 3D""=20

=20 26.67% Will perform only if other MODS were not satisfactory - 7 3D""=20

=20 46.67% Never - 4 3D""=20

=20 26.67% Total Answers - 15

22. Snow Model Melt Factor

Most Likely - 5 3D""=20

=20 33.33% Will perform only if other MODS were not satisfactory - 5 3D""=20

=20 33.33% Never - 5 3D""=20

=20 33.33% Total Answers - 15

23. Others (specified in Question = 12)=20

Most Likely - 6 3D""=20

=20 50.00% Will perform only if other MODS were not satisfactory - 4 3D""=20

=20 33.33% Never - 2 3D""=20

=20 16.67% Total Answers - 12

24. Please select the three most = important=20 factors affecting your decision to perform MODS. (Select only = three)=20

Recent model performance (Observed vs. Predicted) - 15 3D""=20

=20 30.61% Information from observers in the field - 5 3D""=20

=20 10.20% Long term model performance for the given basin/forecast=20 point - 2 3D""=20

=20 4.08% Performance of past modifications during similar = meteorological=20 events - 5 3D""=20

=20 10.20% My personal knowledge and familiarity with the basin - 10 3D""=20

=20 20.41% My personal knowledge and familiarity with observation=20 network - 4 3D""=20

=20 8.16% The magnitude of observations (possibility of flood) - 3 3D""=20

=20 6.12% Mass conservation (Water Balance) - 5 3D""=20

=20 10.20% Other (Please describe below) - 0 3D""=20

=20 0.00% Total Answers - 49

25. Other (from question 24) =

Total Answers - 1 [=20 View Answers ]

26. What do you think is an = acceptable=20 number of iterations for MODS when performing realtime forecast = during=20 flood hazard for an individual segment?
Please check only one=20 statement.

1-3 Iterations - 8 3D""=20

=20 53.33% 4-6 Iterations - 5 3D""=20

=20 33.33% More than 6 iterations - 2 3D""=20

=20 13.33% Total Answers - 15

27. What do you think is an = acceptable=20 number of iterations for MODS when performing realtime forecast = during=20 non-hazard periods?
Please check only one statement.

1-3 Iterations - 10 3D""=20

=20 66.67% 4-6 Iterations - 2 3D""=20

=20 13.33% More than 6 iterations - 3 3D""=20

=20 20.00% Total Answers - 15

Section III. Uncertainty in = Deterministic=20 Forecasts

In this section, we would like to identify, based = on your=20 experience, the main sources of uncertainties and errors in = deterministic=20 forecasts.

Please rate, based on your experience, = the=20 importance of matching observations and predictions for each of = the=20 following hydrograph elements.
For each hydrograph = characteristic,=20 check only one choice. If you select =93Important=92 for a = characteristic,=20 please also note the conditions when it is = important.

28. Baseflow

Important - 10 3D""=20

=20 66.67% Not Important - 5 3D""=20

=20 33.33% Total Answers - 15

29. If you marked = =91Important=92,
Please=20 note the conditions when it is important

Total Answers - 10 [=20 View Answers ]

30. Shape of rising limb

Important - 15 3D""=20

=20 100.00% Not Important - 0 3D""=20

=20 0.00% Total Answers - 15

31. If you marked = =91Important=92,
Please=20 note the conditions when it is important

Total Answers - 15 [=20 View Answers ]

32. Peakflow discharge

Important - 14 3D""=20

=20 93.33% Not Important - 1 3D""=20

=20 6.67% Total Answers - 15

33. If you marked = =91Important=92,
Please=20 note the conditions when it is important

Total Answers - 13 [=20 View Answers ]

34. Shape of recession limb =

Important - 13 3D""=20

=20 86.67% Not Important - 2 3D""=20

=20 13.33% Total Answers - 15

35. If you marked = =91Important=92,
Please=20 note the conditions when it is important

Total Answers - 12 [=20 View Answers ]

36. Total volume

Important - 13 3D""=20

=20 86.67% Not Important - 2 3D""=20

=20 13.33% Total Answers - 15

37. If you marked = =91Important=92,
Please=20 note the conditions when it is important

Total Answers - 12 [=20 View Answers ]

38. Individual ordinates of = hydrograph=20

Important - 6 3D""=20

=20 40.00% Not Important - 9 3D""=20

=20 60.00% Total Answers - 15

39. If you marked = =91Important=92,
Please=20 note the conditions when it is important

Total Answers - 7 [=20 View Answers ]

40. Low flow

Important - 9 3D""=20

=20 60.00% Not Important - 6 3D""=20

=20 40.00% Total Answers - 15

41. If you marked = =91Important=92,
Please=20 note the conditions when it is important

Total Answers - 9 [=20 View Answers ]

42. Time to peak

Important - 14 3D""=20

=20 93.33% Not Important - 1 3D""=20

=20 6.67% Total Answers - 15

43. If you marked = =91Important=92,
Please=20 note the conditions when it is important

Total Answers - 13 [=20 View Answers ]

Please rank, based on your experience, = the degree=20 each of the following may contribute to forecast error and = uncertainties.=20 As in operational cases, assume all models to have been = pre-calibrated.=20
Please check only one choice for each NWSRFS = Element.

44. Hydrology model (SAC-SMA,API) = parameters

Very Important - 8 3D""=20

=20 57.14% Moderately Important - 4 3D""=20

=20 28.57% Somewhat Important - 2 3D""=20

=20 14.29% Not Important - 0 3D""=20

=20 0.00% Not Sure - 0 3D""=20

=20 0.00% Total Answers - 14

45. Hydrology model (e.g. = SAC-SMA,API)=20 structure

Very Important - 3 3D""=20

=20 20.00% Moderately Important - 4 3D""=20

=20 26.67% Somewhat Important - 5 3D""=20

=20 33.33% Not Important - 1 3D""=20

=20 6.67% Not Sure - 2 3D""=20

=20 13.33% Total Answers - 15

46. Initial conditions = (Carryover)

Very Important - 8 3D""=20

=20 53.33% Moderately Important - 4 3D""=20

=20 26.67% Somewhat Important - 3 3D""=20

=20 20.00% Not Important - 0 3D""=20

=20 0.00% Not Sure - 0 3D""=20

=20 0.00% Total Answers - 15

47. Snow model (SNOW-17) = parameters

Very Important - 7 3D""=20

=20 46.67% Moderately Important - 3 3D""=20

=20 20.00% Somewhat Important - 1 3D""=20

=20 6.67% Not Important - 2 3D""=20

=20 13.33% Not Sure - 2 3D""=20

=20 13.33% Total Answers - 15

48. Snow model (SNOW-17) = structure

Very Important - 4 3D""=20

=20 26.67% Moderately Important - 5 3D""=20

=20 33.33% Somewhat Important - 2 3D""=20

=20 13.33% Not Important - 2 3D""=20

=20 13.33% Not Sure - 2 3D""=20

=20 13.33% Total Answers - 15

49. Unit Hydrograph

Very Important - 6 3D""=20

=20 40.00% Moderately Important - 7 3D""=20

=20 46.67% Somewhat Important - 2 3D""=20

=20 13.33% Not Important - 0 3D""=20

=20 0.00% Not Sure - 0 3D""=20

=20 0.00% Total Answers - 15

50. Precipitation input = (Observations)=20

Very Important - 15 3D""=20

=20 100.00% Moderately Important - 0 3D""=20

=20 0.00% Somewhat Important - 0 3D""=20

=20 0.00% Not Important - 0 3D""=20

=20 0.00% Not Sure - 0 3D""=20

=20 0.00% Total Answers - 15

51. Precipitation input = (Forecast)

Very Important - 12 3D""=20

=20 80.00% Moderately Important - 2 3D""=20

=20 13.33% Somewhat Important - 1 3D""=20

=20 6.67% Not Important - 0 3D""=20

=20 0.00% Not Sure - 0 3D""=20

=20 0.00% Total Answers - 15

52. Temperature input = (Observations)

Very Important - 6 3D""=20

=20 40.00% Moderately Important - 4 3D""=20

=20 26.67% Somewhat Important - 2 3D""=20

=20 13.33% Not Important - 3 3D""=20

=20 20.00% Not Sure - 0 3D""=20

=20 0.00% Total Answers - 15

53. Temperature input (Forecasts) =