NB4 subsoil&topsoil

[handuGIS]

Hello, I am preparing data for NB4 and am seeking clarification on how to correctly set the subsoil and topsoil parameters. In HWSDv1.2, the soil is divided into topsoil (0-30cm) and subsoil (30-100cm). However, in HWSDv2.0, the soil is stratified into seven layers, labeled D1 to D7.
I am uncertain about how to proceed when using pyAEZ2.1. Should I consider D1 as the topsoil layer and D2 as the subsoil layer? Or are there alternative settings or recommendations that I should be aware of?
I appreciate your assistance in clarifying this matter. Thank you for your time and expertise.

[NokuzaSezo97]

Hi @handuGIS,

Apologies for the late reply as we have Songkran holidays. The soil constraint module in v2.2 is fixed for HWSD v2.0 methodology which is still experimental and validation is incomplete at the moment. I would suggest to go for soil constraint module from v2.1 as we strictly follow the soil evaluation framework of HWSD v1.2.

Keep in mind that input setting mechanics in v2.1 is different from v2.2. Instead, the former uses two python scripts named as ALL_REDUCTION_FACTORS_IRR/RAIN where edaphic suitability ratings are provided as python lists. So, if v.2.1 is applied, make sure the soil suitability rating setting is done properly (stick to the v2.1 user-guide). I understand that the data preparation is quite tedious at first, so please bear it for the time being as we're figuring things out for the next version.

Warm regards,

Swun Wunna Htet

[luckyji1101]

hi, I would like to ask where I can find the code and documentation for the soil constraint module from v2.1? Also, when will the soil constraint module in v2.2, which is fixed for HWSD v2.0, be available for use? If the version 2.2 cannot be used, why is it written in the provided documentation?
I appreciate your assistance，thanks a lot.