The comprehensive assessment of climatic and hydrological droughts in terms of their temporal and spatial evolutions is very important for water resources management and social development in the basin scale. To study the spatial and temporal changes of climatic and hydrological droughts and the relationships between them, the SPEI and SDI are adopted to assess the changes and the correlations ...

This paper proposes a new approach to solve the problem of computing the capture basin C of a target T. The capture basin corresponds to the set of initial states such that the target is reached in finite time before possibly leaving of constrained set. We present an algorithm, based on interval analysis, able to characterize an inner and an outer approximation C− ⊂ C ⊂ C+ of the capture basin....

this study was conducted to determine taxonomic and zoogeographic features of fishes from the kor and helleh river basins in southwestern iran. the specimens were collected from 2004 to 2007. twenty four species belonging to 20 genera, 9 families, and 6 orders from the kor river basin and 21 species belonging to 19 genera, 8 families, and 6 orders from helleh basin were identified. ichthyofauna...

in this study impact of climate change on operation of gorgan rud basin's dams was evaluated. in this regard temperature and precipitation of the basin for 2011-2035 periods were downscaled using sdsm model and cgcm3-a2 outputs. results showed that annual temperature would increase 0.05°c and annual precipitation would decrease about 4percent. to predict streamflow of the gorgan rud basin ...

binaloud mountains formed during collision of iran and turan plate in the late triassic time and caused shortening of the sedimentary cover because of cimmerian and alpine orogeny. the thrust sheets with different generations formed as a results of the binalood and alborz fold- thrust belts. northeast of iran that was already south coast of the divergent margin of the paleothetys ocean at this ...

Introduction: A very old, very large basin has been found to underlie the region of large maria on the near side of the Moon. The strong differences between the near and far sides of the Moon have led to searches for such a basin in the past [1], [2], [3]. The Topogrd1 elevation database [4] from the Clementine mission was used to locate the basin. Its central depression covers more than half t...

Geophysical basins of terrestrial surfaces have been quantitatively characterized through a host of indices such as topological quantities (e.g. channel bifurcation and length ratios), allometric scaling exponents (e.g. fractal dimensions), and other geomorphometric parameters (channel density, Hack’s and Hurst exponents). Channel density, estimated by taking the ratio between the length of cha...

Studies of genetic connectivity and population structure in deep-sea chemosynthetic ecosystems often focus on endosymbiont-hosting species that are directly dependent on chemical energy extracted from vent effluent for survival. Relatively little attention has been paid to vent-associated species that are not exclusively dependent on chemosynthetic ecosystems. Here we assess connectivity and po...

Argyre, located in the southern highlands southeast of Tharsis, is one of the largest impact basins on Mars and formed in Early Noachian time. We use Mars Global Surveyor (MGS) data to characterize the basin and its geologic features and units. It has been proposed that meltback of a south polar ice cap during the Noachian completely 6lled the basin with water, that the out7ow channel in the no...

A basin boundary can undergo sudden changes in its character as a system parameter passes through certain critical values. In particular, basin boundaries can suddenly jump in position and can change from being smooth to being fractal. e describe these changes ("metamorphoses") and f&nd that they involve certain special unstable orbits on the basin boundary which are aceessibIe from inside one ...