Which classification system is better when to compare between Anderson's LULC classification of 1976 or National Land Cover database 2011?

Though Anderson's 1976 classification is the most conventional LULC classification system, and at the same time NLCD 2011 being a subset of the earlier one, there is confusion with barren and...

10 March 2020 5,369 3 View

How to fix the voids on a floodplain map by using HEC_RAS model?

24 January 2021 9,054 2 View

How the precipitation Ratio and flow Ratio effect the output of the result?

I am doing HEC HMS calibration than i want to increase simulated value and volume of the computed so that my issue is how the precipitation and flow ratio make influential that result?

22 January 2021 152 2 View

Can anyone please tell me, what will be the Crop Coefficient value for shortleaf pine and oak tree in HEC-HMS model simulation?

my study area located in the forest region having Shortleaf Pine and Oaktree, thus in the Canopy Method I am trying to get the Crop Coefficient value of these trees but did not get anything.

18 January 2021 9,789 1 View

HEC RAS: project file error?

When I try to create a new project file on HEC RAS, this message appears "title and file name must be specified", even when I have already specified them.

03 January 2021 5,618 2 View

How to download future precipitation data for years 2021-2030?

For my future discharge forecast in the calibrated HEC HMS model, i need the precipitation data of the future.How can i get this data in the daily timescale?

21 December 2020 8,928 5 View

How to perform snowmelt runoff modeling in hEC HMS?

My study area of rainfall-runoff modelling is in mountainous region and has snow cover. There is about 10 percent snowmelt contribution to the discharge of the river i am modelling. How can I...

23 November 2020 7,873 4 View

How to solve the longest flow path error in HEC-geo HMS?

I'm having issues running the Longest Flow Path tool in HEC geo HMS. Attempting to run the Longest Flow Path tool results in the following warning error message. The error is attached. All...

19 August 2020 9,365 4 View

How can i classify these soils obtained from SOTER database to different Hydrological soil groups reguired in HEC HMS CN method??

I dont have any other soil maps for my study area.. How can i use this data to convert it into Hydrological soil groups A,B,C or D ?

04 August 2020 7,848 6 View

How do I determine the correct ratio to peak value for the Recession baseflow in HEC-HMS?

I am wondering if there is a way to estimate the ratio to peak value without calibration? What would be the most suitable value if I don't have a measured hydrograph to compare? Thanks for any...

27 July 2020 2,242 1 View

How do I estimate initial baseflow for each subbasin (HEC-HMS) ?

I have one hydrograph close to the watershed outlet from which I can extract a baseflow value. But what values would I assign to all the other subbasins? The HEC-HMS user manual says the...

21 July 2020 5,431 3 View