the derakhte senged area is located in south of neishaboor town at khorasan razavi province. in this research, desertification intensity of derakht senged area was evaluated using imdpa, one of the newest method to assess desertification potential in arid and semi arid regions of iran. to evaluate desertification intensity, based on the primary research in this area, 4 criteria were selected in...

Many recent studies have been devoted to the investigation of the nonlinear dynamics of rainfall or streamflow series based on methods of dynamical systems theory. Although finding evidence for the existence of a low-dimensional deterministic component in rainfall or streamflow is of much interest, not much attention has been paid to the nonlinear dependencies of the two and especially on how t...

H and geomorphology are important determinants of the structure and function of fluvial ecosystems. Streamflow quantity and timing are often viewed as “master variables” limiting the distribution and abundance of riverine species (Poff et al. 1997) and the flux of nutrients into streams (Grimm 1987, Welter et al. 2005). Geomorphic structure—particularly channel form—is known to influence commun...

Many recent studies have been devoted to the investigation of the nonlinear dynamics of rainfall or streamflow series based on methods of dynamical systems theory. Although finding evidence for the existence of a low-dimensional deterministic component in rainfall or streamflow is of much interest, not much attention has been given to the nonlinear dependencies of the two and especially on how ...

Introduction: In May 2008 the Phoenix Lander descended into the north polar region of Mars. It landed at 68.22 N, 234.25 E in a shallow valley about 20 km west of a 10 km crater named Heimdall. Phoenix imaged local geomorphology, determined local ice table depth and analyzed 19 soil samples from within a ~15 m 2 work volume. Important to

İlk kez 1913 yılında de Martonne tarafından kullanılan Klimatik Jeomorfoloji kavramı 20. yüzyılınbaşlarından itibaren birçok ülkede benimsenmiş ve pek çok kişi konuyla ilgili sayısızçalışmalar yapılmıştır. Yer şekillerinin oluşumunda, gelişiminde dağılışında iklimin öneminevurgu yapan söz konusu yaklaşım, başlangıçta W.M.Davis’in fikirleri çalışmaları etrafında şekillenmiştir.Bu dönemde araştır...