environmental archaeological zones records
soil erosion soils degraded area yr tonnes maji wastelands preliminary statistics assessment degradation organizations 2008a
gujarat gap alluvial sabarmati towards drainages implications hydrological adjustment drainage paleoenvironmental reaches variability sediment succession lithostratigraphy
girnar gujarat complex herpetofauna preliminary
gujarat climatic district cropping agro rainfall 1990 average environmental soils
gujarat tectonic estimation hazard seismic yadav