Dear EB. I will peruse your detailed 46pgs papr and comment on same. I had a cursory glance, and am appreciative of the details given. Meanwhile I want your project researchrs while they are working on hydo-geological details, also to peruse cum study seismology aspects in the African regions you are working on. I want you to feel the importance of sub-soil aquifers and their retaining capacity of water resources Etc. Water and sub soil regimes contain moisture and greens, and these stratas behave like sponges. When water is abundant they retain extra water and in drought / dry times they release water to sustain the terestrial ( on land ) bio-diversity assets. Now I would deliberate the main point ie the very nature of sub soil to be moist with greens on surface Etc.. In this condition if e quakes/ tremors are felt, they are fairly absorbed, due to sub- soil sponge effect. Whereas, if they are dry and drier, then the hard nature of soil being rocky in nature would transmit shocks which would be more pronounced, being less absorbed in sub-soil stratas. This leads to serious effects in urban areas with high rise buildings Etc. Therefore, the respective aquifers are water-conserved and areas are RWH-ed. Water levels are maitained to avert ill effects on e quakes and tremors. Will seek your view points regarding African urban scenario. pl. Well wishes. Prof Ajit Seshadri. Chennai.

Published August 26, 2019 20:49 by Ajit Seshadri Seshadri, Er.