نتایج جستجو برای: alluvial fans
تعداد نتایج: 7388 فیلتر نتایج به سال:
Introduction: Deltas, fans and channels on Mars clearly indicate surface water in the past. These landforms contain valuable information about the duration and magnitude of surface-water flow, with obvious implications for potential life on Mars. Martian fan-shaped deposits such as deltas and alluvial fans show architectural elements similar to those of terrestrial analogs, e.g. lobes, terraces...
Alluvial fans are an important land resource with agricultural potential in Qinghai–Tibet Plateau. The spatiotemporal variation use/cover is indicator to understand the value of alluvial and protect make scientific use such fans. In this study, characteristics determined by analysing changes Lhasa River Basin (LRB) at different times, counties/districts, altitudes, gradients. Results show that ...
abstract: in this research, the relationship between geomorphologic factors with underground water resources in zahab plain (in west of kermanshah) has been analyzed using by analyzing-deducing and weighting methods. first, by using of pizometeric and exploratory well data, variation of water table in zahab plain has been comparative analysis with geomorphic unites and then, the zahab watershed...
Many arid alluvial-fan terraces downwind from eolian sand sources exhibit an abrupt increase in Av-horizon thickness and sand content below a critical elevation which varies from fan to fan. Above this elevation, sand accumulates locally and is not transported across the fan. Below this elevation both coarse and fine eolian sand from nearby playa and channel sources is readily transported acros...
Historical aerial photographs and field observations on five fluvially dominated alluvial fans in southern Arizona demonstrate that channel avulsion invariably occurs where bank heights are low and often at channel bends. Channel abandonment occurs through stream capture when overland flow from the main channel accelerates and directs headward erosion of smaller channels heading on the fan surf...
Radebaugh R.D. Lorenz, T. G. Farr, R. L. Kirk, J. I. Lunine, D. Ventra, A. Le Gall, R. M. C. Lopes, J. W. Barnes, A. Hayes, E. R. Stofan, S. D. Wall, C. Wood. Department of Geological Sciences, Brigham Young University, Provo, UT 84602 ([email protected]); Johns Hopkins Applied Physics Laboratory, Laurel, MD; Jet Propulsion Laboratory, Pasadena, CA; USGS Astrogeology Division, Flagstaff AZ; Corne...
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