Regarding Dataset prepartion for Kelaniya River Basin, Sri Lanka

[Hrekhani97]

Hello,

I am Madhawa, a student from Sri Lanka. I am planning to use the LISFLOOD model for my research on the Kelaniya River Basin in Sri Lanka. I have successfully installed the model and run the test cases. Currently, I am working on creating a custom dataset for the Kelaniya River Basin. I’ve already developed general maps and topography maps, except for the elvstd.map, and have created land use fraction maps based on local land use data.

I am facing a few challenges and would appreciate your guidance on the following issues:

I used the MERIT DEM to create all the general and topography maps and plan to run the model at a 1 km x 1 km spatial resolution. Could you please advise on how to create the elvstd.map file using PCRaster within QGIS? Do I have to calculate the elevation standard deviation for the original Merit DEM file and resample that to my target resolution?

For the land use fraction maps, I relied on a local land use survey to obtain accurate data. Could you explain the process for calculating land-use-dependent layers, such as the crop coefficient and crop group number? The methodology on the website involves a large number of land use classes, whereas my dataset for the Kelaniya Basin uses a simplified local classification. How should I proceed to develop these two layers in this context?

Thank you very much for your time and assistance. Your support would be greatly appreciated.

Best regards