Question about the rainfall input format and number of rows and columns

[johnjarmitage]

First: could I say that this code is great!

Second: I am probably missing something obvious, but I am having difficulty understanding the rainfall input data format. From the read the docs, the rainfall data is "the rainfall rate at each rainfall input time step in mm/hr". Is it therefore a single column of data where the length of that column is equal to the number of time steps defined by max_run_duration in seconds divided by max_time_step? In the test run on Boscastle paleoDEM_v1_72hr_rain_u.txt has 864 rows, which is 72hrs in seconds divided by 300 seconds. However, paleoDEM_v1_72hr_rain_u.txt also has 28 columns, why?

Furthermore, I tried to run a 10 day simulation. I chose a max_time_step of 1000 seconds, and a max_run_duration of 240hrs. This means that my rainfall data should have 864 rows and one column. HAIL-CAESAR ended with a segmentation fault at some point after 2.5 days of model time. I increased the length of my rainfall input to 1000 rows, and the segmentation fault occurred at some point after 3 days. Therefore I am now guessing that the number of rows within the rainfall data file is not given by the max_time_step, but the actual time step the model uses based on the CFL condition?

[johnjarmitage]

I think I found part of the answer to my own question:

rain_data_time_step:
The timestep of the rainfall inputs. Note: even if you set this to something other than 60 (for hourly rainfall), the units are always mm/hr. I.e. this is the instantaneous rainfall rate at each timestep.

(This often happens to me after I write the question and click send, sorry)

[tcoulthard]

Try looking at the wiki for tab parameters on the Caesar Lisflood pages. On 25 May 2020, at 08:55, John Armitage <[email protected]> wrote:  I think I found part of the answer to my own question: rain_data_time_step: The timestep of the rainfall inputs. Note: even if you set this to something other than 60 (for hourly rainfall), the units are always mm/hr. I.e. this is the instantaneous rainfall rate at each timestep. (This often happens to me after I write the question and click send, sorry) — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub<#33 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ACXM2LLVF6YBM5ASOUBDDDDRTIP45ANCNFSM4NJJWHTA>.