Six soil profiles differing in their texture, CaCO3 and salinity were chosen from west and middle Nile Delta for the study. The 1st and 2nd profiles from Borg El-Arab area were sandy loam in texture and > 30% CaCo3,while the 3rd and 4th profiles (from Nubaria area ) were sandy clay loam and < 30 % CaCo3.The 5th profile from Epshan area was non-saline clay alluvial soil and the 6th from El-Khamsen was saline clay alluvial soil. Data showed that the specific surface area (S) values were 34-53 and 44-60 m2/g for calcareous soils of Borg El-Arab and Nubaria areas ,206-219 and 206-249 m2/g for non-saline and saline clay alluvial soils of Epshan and El-Khamsen areas respectively.The corresponding values of the external specific surface area (Se) were 16-21 ,14-22 ,72-86 and 92-112 m2/g. The maximum adsorption capacity (Wa) which equal to Wm+2Wme was ranged from 1.88 to 2.70% ,1.97 to 2.95 % ,9.70-10.70 % and 10.80 to 13.12 % while the maximum hygroscopic water (MH) values were 2.43-3.78% ,2.91-4.65 %,16-17 % and 18.30-21.9 % for the studied soil profiles respectively. The residual moisture content at PF 7 and P/P0 =0 was ranged from 0.0005-0.0010%, 0.0007-0.0019% and 0.0043-0.0048% in Borg El-Arab, Nubaria and Epshan soil profiles respectively. The inter-relations between the surface area and the hygroscopic moisture parameters of the soils under investigation were as follows: Cacareous soils; Wm=0.40 MH, Wc = 0.55 MH, Wa = 0.70 MH, S = 14 MH Non-saline soil ; Wm=0.35 MH, Wc = 0.49 MH, Wa = 0.63 MH, S = 13 MH Saline soil ; Wm=031 MH, Wc = 0.45 MH, Wa = 0.59 MH, S = 12 MH These relations give possibility to deduce the soil hygroscopic moisture parameters and specific surface area via maximum hygroscopic water which can obtained through the experimental determination.