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ABSTRACT:The increase in concern about drought in the Seyhan−Ceyhan River Basins in Turkey has brought about the need to define temporal and spatial drought variations. Unlike previous studies that cover this region in the current literature, sufficient amounts of data from 14 meteorological and 12 streamflow stations are used in the form of 3, 6 and 12 month timescales allowing both meteorological and hydrological drought analyses to be conducted in detail. The standardized precipitation index and streamflow drought index methods are employed for the drought analyses presented. The location, period and occurrence level of drought events for this region are specified and presented graphically. The correlation between hydrological and meteorological droughts suggests that there is a specific lag time for the droughts such that a meteorological drought emerges in the following year as a hydrological drought. Accordingly, the predicted hydrological drought period may allow for better planning of the efficient use of water resources and hydroelectric and agricultural production in this region.

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This paper presents a general algebraical formula to determine the vertical stresses resulting from a linearly distributed surface pressure resting on an elastic medium. This problem and its various derivations has received considerable attention because of its applications in foundation engineering [1}5]. The equation presented in this paper has been determined by the integration of the Boussinesq [6] equation with respect to the general surface function of a linearly distributed loading regime. The equation can be applied to the case of an optimally designed rectangular footing subjected to biaxial bending. Unlike the current design formulae [1}7], it provides the #exibility of having various contact pressures at each of the four corners of the rectangular area. This may enable more accurate design procedures for pad foundations in the future. This paper explains the validity of the new formula by comparing its results with those produced by classical methods. It shows how it can be applied to determine the vertical stress distributions resulting from all types of linearly distributed surface pressures which occupy a rectangular area on an elastic mass.