calculatting the exact volume of nabkha can be good to find the real cost that each native plant can save after knowing the cost of sand encroachment around infrastructure.
Your question intreagued me. So I read a bit about nabkhas, as I've never heard of this sand structure before. And about the second sentence I read was "A nabkha is variable in size and shape." This makes it a bit difficult to give a general formula (especially the varying shape).
"The typical example is a steep mound with a flat top." This would roughly correspond to a truncated cone.
Thank you Dr. Ingo Riess
The volume of the accumulated aeolian sand around a plant (nabkha, nebkha, coppice dune) was measured in accourdance to the formula mentioned in our attached formula. It was measured to put an economic value supported by native plants in controlling or adaptting ith mobile sand within desert environment which could be applied for snow.
regards
We already done few research studies regarding this subject (attached)