drought is a major problematic phenomenon for the mostly semi-arid country of iran. the north centralregions of iran (north of esfahan and ghom province) have suffered from severe droughts several times duringthe last three decades. the frequent occurrence of drought in these regions is due to low and inconsistentprecipitation, abnormally high temperatures, increases in surface albedo and evapo...

We examine the effects on the mid-latitude D-region of two geomagnetic storms, the "Halloween storm" of late October 2003 and the 07 April 2000 storm, by means of the associated perturbations of several subionospheric VLF/LF signals propagating in both the northern and southern hemispheres. We use VLF/LF nighttime data from the Holographic Array for Ionospheric/Lightning Research (HAIL), locate...

Abstract The Murray-Darling Basin (MDB) is Australia’s major agricultural region. southern MDB receives most of its annual catchment runoff during the cool season (April–September). Focusing on Murrumbidgee River measurements at Wagga and further downstream Hay, river heights are available year to year. 27-year period April–September Hay exhibit decreases between 1965 1991 1992–2018 not matched...