Human activities have changed the shapes of river deltas
نویسندگان
چکیده
منابع مشابه
Entropy and optimality in river deltas
The form and function of river deltas is intricately linked to the evolving structure of their channel networks, which controls how effectively deltas are nourished with sediments and nutrients. Understanding the coevolution of deltaic channels and their flux organization is crucial for guiding maintenance strategies of these highly stressed systems from a range of anthropogenic activities. To ...
متن کاملTransient ischemic attack: the rules have changed.
Bob: If you thought you knew what a transient ischemic attack (TIA) is, and how to evaluate for it, think again. This scientific statement snuck past a lot of us and its implications are far-reaching. The guideline includes three game changers for all physicians: • It revises the definition of TIA • It recommends that magnetic resonance imaging (MRI) be performed within 24 hours in patients pre...
متن کاملTransport and Vulnerability in River Deltas: A Graph-Theoretic Approach
Maintaining a sustainable socio-ecological state of a river delta requires delivery of material and energy fluxes to its body and coastal zone in a way that avoids malnourishment that would compromise system integrity. We present a quantitative framework for studying delta topology and transport based on representation of a deltaic system by a rooted directed acyclic graph. Applying results fro...
متن کاملHave Internet Changed the Wage Structure Too?
This paper investigates whether workers who use Internet at work earn a higher wage than otherwise similar workers who do not use Internet at work. By replicating Krueger’s analysis using recent Current Population Survey data sets, this study is able to compare the similarities and differences of the use of two revolutionary modern technologies, computer and Internet. Estimates suggest that whi...
متن کاملthe effects of cooperative versus individual directed reading thinking activities on students inferential and referential questions
two groups of students were assigned as experimental and control ones, and were given instruction on directed reading-thinking activities and after some treatment, they were post-tested. although the initial pre-test did not show any significant differences, the final post-test result revealed that the cooperative reading comprehension helped the experimental group. the cooperative students’...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 2020
ISSN: 0028-0836,1476-4687
DOI: 10.1038/d41586-020-00047-y