The physical development of cities is always faced with natural barriers. The physical development of the city of Zabol, located in the Sistan plain, is threatened specifically with the development of sand dunes. For this reason, the region’s drought conditions were investigated and the standardized precipitation index was calculated. The results showed that with the drying of Hamoon Lake, the ...

The hardness was found to be lower (by ;10 in Rockwell H scale) and the volume electrical resistivity was found to be higher (about doubled) at the edge (up to a depth of ;5 cm for curing at 100% relative humidity) than at the center of a cement mortar specimen prior to loading. This is attributed to the faster drying at the edge and the resulting poorer bond between cement paste and sand at th...

To investigate the influence of different growing substrates (two mineral, two organic) on root xylem ABA concentration ([ABA](root)) and the contribution of the drying root system to total sap flow during partial rootzone drying (PRD), sunflower (Helianthus annuus L.) shoots were grafted onto the root systems of two plants grown in separate pots. Sap flow through each hypocotyl was measured be...

FIG. 1.—Generalized location map of Big Cottonwood Canyon, southeast of Salt Lake City. Circled numbers refer to measured sections of: 1, Storm Mountain (Fig. 7); 2, S-curve (Fig. 9B); 3, Moss Ledge (Fig. 9A). ABSTRACT: The Mesoproterozoic to Neoproterozoic Big Cottonwood Formation of north-central Utah contains some of the oldest known (; 900 Ma) examples of cyclic tidal rhythmites. Despite mi...

The effects of laundering and time of exposure on the insecticidal activity of military uniform fabric impregnated with permethrin at 0.125 mg active ingredient (AI)/cm2 are reported from susceptibility tests with laboratory-reared mosquitoes, Culex pipiens, and sand flies, Phlebotomus papatasi. Knockdown/mortality resulting from exposure of groups of female insects for periods of 1, 3, 5, 7, a...

Abstract This paper presents an experimental study on quantifying the effects of soil suction resistance offered by compacted unsaturated backfills to uplift buried steel pipes and identifying mechanisms that contribute increased compared similar in dry sand. is achieved means 1-g physical model experiments, with pipe sandy loam–Kaolin beds varying water content (suction), same unit weight. The...