نتایج جستجو برای: river valleys

تعداد نتایج: 87038  

2014
John B. Gates Gregory V. Steele Paolo Nasta Jozsef Szilagyi

[1] Variability in sediment hydraulic properties associated with landscape depositional and erosional features can influence groundwater recharge processes by affecting soil-water storage and transmission. This study considers recharge to aquifers underlying river-incised glaciated terrain where the distribution of clay-rich till is largely intact in upland locations but has been removed by all...

Journal: :The New phytologist 2011
Rui Wang Jin-Feng Wang Zhi-Jing Qiu Bin Meng Fang-Hao Wan Yin-Zheng Wang

• With growing concerns over serious ecological problems, a particular challenge is to reveal the complex mechanisms underlying rapid expansion of invasive species. Ageratina adenophora is of particular interest in addressing this question. • We used geographic information systems and logistic regression to identify the geographic and environmental factors contributing to the presence of A. ade...

Journal: :تحقیقات جغرافیایی 0
محمد علی زنگنه اسدی حکیم سبزواری فریبا همتی حکیم سبزواری شهرام بهرامی حکیم سبزواری

the study area, paykola anticline, is located in the southwestern part of kermanshah province. the aim of this research is to evaluate the geomorphological indexes of active tectonics in paykola anticline as well as to study the effect of tectonic in the form and direction of geomorphological landforms. to achieve the aim of study, the lithological and tectonic characteristics of study area wer...

2015
David Jarman Marc Calvet Jordi Corominas Magali Delmas Yanni Gunnell

This first overview of large-scale rock slope failure (RSF) in the Pyrenees addresses the eastern third of the range. Around 30 principal RSFs >0.25 km and 20 lesser or uncertain cases have been identified from remote imagery and groundtruthing. Compared with other European mountain ranges, RSF incidence is relatively sparse, displays no obvious regional trend or spatial clustering, and occurs ...

2016
Shumon T. Hussain Harald Floss

Large river valleys have long been seen as important factors to shape the mobility, communication, and exchange of Pleistocene hunter-gatherers. However, rivers have been debated as either natural entities people adapt and react to or as cultural and meaningful entities people experience and interpret in different ways. Here, we attempt to integrate both perspectives. Building on theoretical wo...

Journal: :E3S web of conferences 2023

The object of the study is valleys small rivers Chuvash Republic. type economic use, degree anthropogenic contamination, modern slope processes are analyzed. need for research justified by deterioration ecological state landscapes river valleys, water quality in watercourses In order to collect factual material on current expeditions were conducted Tsivil, Kubnya, Kirya. Lyulya. choice selected...

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