I have monthly inflow and outflow data of a dam . I need daily runoff in depth (mm/day) is it possible to convert or model monthly data into daily data? Kindly provide references of your argument.
If you have a Hydrologic Model such as mHM (www.ufz.de/mhm), and if you have daily forcings (Precip, Ta, Tx,Tm, etc), you could attempt to calibrate your model running at daily or shorter times steps (e.g., hour) to reproduce the monthly values. The result of this inverse problem would be a daily time series of streamflow that takes into account the daily dynamics of the forcing and best reproduce your monthly observations.
However, I do not understand how you could have monthly streamflow if you do not have daily values?
Luis Samaniego I am much thankful for your kind comment . I do not have this model and daily forcing data. I am working on a catchment which is within Pakistan. I have worked on this catchment during My Masters and as per project requirement I have collected monthly data from relevant organization and it took almost 6 months to get this data. Right now I am a PhD student out of my country. The daily data is available but it is in hard farm and without reference it is not accessible easily. So its difficult for me to leave PhD and spend 6 months again to get daily data from relevant organization...
You can easily get daily rainfall and evapotranspiration data from satellite observations (e.g., GPM, GLEAM) or reanalysis datasets. Then, you can run the hydrological model (e.g.mHM, MISDc: https://www.researchgate.net/publication/257965418_Continuous_Rainfall-Runoff_Model_Matlab_code) and obtain daily streamflow data.
Good luck, L
Data Continuous Rainfall-Runoff Model - MISDc (Matlab code)
Dear Muhammad, I agree with Luis Samaniego's answer, you should definitely download inputs and run any model with a daily time step (because if run at a monthly time step discontinuities will appear) and then build your "mean modeled discharge" using mean or median values for each month to compare it with your data. If possible, getting extreme values (minimum and maximum) would help you greatly to perform an adequate calibration of your model.
Cheers and good luck!
- Badges
- Science topic