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California's highly variable climate and growing water demands combine to pose both water-supply and flood-hazard challenges to… Expand In old times, castles were surrounded by moats (deep trenches filled with water, and even alligators) to thwart or discourage… Expand Even in a relatively quiet and sober decade, such as the seventies, one can hardly subscribe to Daniel Belt's evidently premature… Expand Balancing the amount of N needed for optimum plant growth while minimizing the NO 3 that is transported to ground and surface… Expand AbstractOrogenic gold deposits have formed over more than 3 billion years of Earth’s history, episodically during the… Expand Abstract This paper presents a review of the procedures to design and retrofit water networks. Although the emphasis is in… Expand In humid uplands landsliding is the dominant mass wasting process. In the western Southern Alps of New Zealand landslides are… Expand The origin of the highly eccentric, inclined, and resonance-locked orbit of Pluto has long been a puzzle. A possible explanation… Expand The structure and history of the Qinling range, which separates the North and South China cratons, are a key to the tectonic… Expand This paper formulates the optimal control problem for a class of mathematical models in which the system to be controlled is… Expand