Understanding how plant communities respond to increased evaporation and consequent water level drawdown (WLD) is critical for predicting the functioning of northern peatlands under climate change. Functional traits provide a quantitative link between vegetation ecosystem functions and, therefore, constitute useful concept responses We studied impact long-term experimental WLD on vascular moss ...

The Three Gorges Dam features two water-level fluctuation zones (WLFZs): the preupland drawdown zone (PU-DZ) and the preriparian drawdown zone (PR-DZ). To investigate the vegetation potential of Roegneria nutans in WLFZs, we compared the submergence tolerance and germination dynamics in the natural riparian zone (NRZ), PU-DZ and PR-DZ. We found that the NRZ seeds maintained an 81.3% intactness ...

T. Hájek ([email protected]), Inst. of Botany of ASCR, Dukelská 135, CZ 37982 Třeboň, Czech Republic. E-S. Tuittila and R. Laiho, Dept of Forest Ecology, Univ. of Helsinki, PO Box 27, FIN-00014 Helsinki, Finland. M. Ilomets, Dept of Landscape Ecology, Inst. of Ecology, Tallinn Univ., Uus-Sadama 5, EE 10120 Tallinn, Estonia. TH also at: Faculty of Science, Univ. of South Bohemia, Branišovská 31...

One measure of riskiness of an investment is “drawdown”, defined, most often in the asset management space, as the decline in net asset value from a historic high point. Mathematically, if the net asset value is denoted by Vt , t ≥ 0, then the current “peak-to-trough” drawdown is given by Dt = Vt − max0≤u≤t Vu. The maximum drawdown, max0≤u≤t Du, is a statistic that the CFTC forces managed futur...

An analytical solution is developed for three-dimensional flow towards a partially penetrating largediameter well in an unconfined aquifer bounded below by a leaky aquitard of finite or semi-infinite extent. The analytical solution is derived using Laplace and Hankel transforms, then inverted numerically. Existing solutions for flow in leaky unconfined aquifers neglect the unsaturated zone foll...

A predictive framework is developed and applied to evaluate benefits of multilevel intake configurations in managing temperature TW and turbidity CT,W in water withdrawn from a water supply reservoir, Schoharie Reservoir, New York, that presently, has a single level intake. High values of TW occur in late summer for the reservoir in major drawdown years, and high CT,W levels occur irregularly f...