kindly let me know trend analysis for precipitation and temperature data is mandatory prior to calibration and validation of hydrologic model followed by simulation for climate change impact on water resources or it can be skipped as i am carrying out bias correction for my RCM Data also?
Hello Saima,
The question you have raised is of different entity, the results of trend analysis results in identification of tendency (direction) of the considered variable through time. Whereas, climate change impact assessment shows the plausible implication of climate change in the considered sector (water resources for your case). It has nothing to do with bias correction or RCM data set. Therefore, if you want to identify the trend (direction of movement) of the climatic variables you can go ahead (as it is not mandatory) prior to your analysis on climate impact assessment. Hope it helps!
thanks a lot Proloy Deb for your detailed answer. Actually i was just concerned as I found it skipped in many studies whereas many researchers have done trend analysis before proceeding for climate change simulations.
It is not mandatory, if you want you can perform trend test although it is better to perform since it shows the shifts in hydro-climatological regime through time.
Hi it can be mandatory if you have climate data from different RCMs to check which RCM reproduce the expected trends in the era of climate change. The model that indicate increase in temperature (very important) which is expected in future climate must used in hydrological assessment. If the RCM indicate decrease in temperature, it must be avoided in the analysis. Check the trends with the observed data for historical climate. If the model does not reproduce the observed trends it must be avoided for future analysis. Do the same for rainfall.
This is important only if you have data from different RCMs
thanks alot Proloy Deb for the reply.
Philbert Modest Luhunga i am using only one RCM data.
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