well spacing requirements that limit well density are also a type of zoning regulation zoning is commonly decided by hydrologists geologists or environmental engineers working for a government regulatory agency and is thus often sensitive to local hydrologic conditions for example well spacing restrictions are often set explicitly on the basis of local hydrologic properties to avoid significant well interference thus above aquifers with higher transmissivities and lower storativities there are correspondingly larger wellspacing requirements eg see brozovic et al