Pyrethroid insecticide use in California, USA, is growing, and there is a need to understand the fate of these compounds in the environment. Concentrations and toxicity were assessed in streambed sediment of the San Joaquin Valley of California, one of the most productive agricultural regions of the United States. Concentrations were also measured in the suspended sediment associated with irrig...

In an attempt to reconstruct the function of the last leprosarium in Croatia, situated in the little town of Metkovic in the Neretva valley, we used local folk tales and compared them with different data sources, such as register of deaths in the Roman Catholic parishes in Metkovic and the nearby village of Vidonje, archived local newspapers, building documents, and different artifacts from the...

The possible presence of sand flies (Diptera: Psychodidae) among colonies of Gunnison's prairie dogs, Cynomys gunnisoni Baird, was investigated on or near ranches with histories of vesicular stomatitis (VS) in domestic livestock in the mid-Rio Grande River Valley, NM, and west-slope region of Colorado. Sampling was conducted at six locations, three in each region, using three methods: standard ...

Landscapes have been shown to exhibit numerous scaling laws from Horton's laws to more sophisticated scaling in topography heights, river network topology and power laws in several geomorphic attributes. In this paper, we propose a different way of examining landscape organization by introducing the “river corridor width” (lateral distance from the centerline of the river to the left and right ...

Abstract Channel planform patterns arise from internal dynamics of sediment transport and fluid flow in rivers are affected by external controls such as valley confinement. Understanding whether these channel preserved the rock record has critical implications for our ability to constrain past environmental conditions. Rivers belts, which one most ubiquitous accessible parts sedimentary record,...

The arid valley is a unique type of ecological fragile landscape in the Hengduan Mountain Area, China. The boundary of the arid valley is one of the response indicators to mountainous climate change. Based on the meteorological data from 1999 to 2013 and the SPOT remote sensing images in 1999 and 2013 this study explored the response characteristics of the arid valley boundary to regional clima...

The diurnal variation of regional wind patterns in the complex terrain of the Grand Canyon area was investigated for wintertime fair weather days using a network of wind sensors on 10-m towers. Thermally driven alongslope and along-valley circulations were present at all sites within the region, but wind characteristics varied from site to site depending on nearby topography and exposure. Along...

A new species of the genus Perigrapha, P. yasawii sp. n. is described from Syrdarya river valley, South Kazakhstan. The adults and male genitalia of the new and related species are illustrated.