نتایج جستجو برای: hourly evapotranspiration
تعداد نتایج: 16051 فیلتر نتایج به سال:
Models used for the remote estimation of evapotranspiration are evaluated using aircraft observations over two distinct vegetation regimes in southwestern Australia. Single-source models using an empirically determined excess resistance term performed better than a two-source model, which does not require such a parameterization. The mean absolute difference between measured and estimated value...
Successfully applied in the carbon research area, sun-induced chlorophyll fluorescence (SIF) has raised interest of researchers from water domain. However, current works focused on empirical relationship between SIF and plant transpiration (T), while mechanistic linkage them not been fully explored. Two mechanism methods were developed to estimate T via SIF, namely water-use efficiency (WUE) me...
Introduction Conclusions References
-Evapotranspiration experts often need to make decisions relating to the precision of the results of various existing methods such as traditional and satellite methods. For these reasons a decision support system (EVA) is developed in order to provide evapotranspiration experts with a tool for evaluating the results of a variety of existing methods for estimating potential and real evapotranspi...
The impacts of global change, including extreme heat and water scarcity, are threatening an ever-growing urban world population. Evapotranspiration (ET) mitigates the island, reducing effect waves. It can also be used as a proxy for vegetation use, making it crucial tool to plan resilient green cities. To optimize trade-off between greening security, reliable up-to-date maps ET cities urgently ...
[1] We analyze the propagation of daily fluctuations in rainfall and potential evapotranspiration to soil moisture dynamics, using a stochastic model that accounts for these two different forms of hydroclimatic variability. The pulsing, intermittent behavior of daily precipitation is described by a compound Poisson process that models the unpredictability of both frequency and amount of rainfal...
This study evaluates the performance of four evapotranspiration methods (Priestley-Taylor, Penman-Monteith, Hargreaves and Makkink) of differing complexity in a semiarid environment in north China. The results are compared to observed water vapour fluxes derived from eddy flux measurements. The analysis became necessary after discharge simulations using an automatically calibrated version of th...
[1] Half-hourly measurements of the net exchanges of carbon dioxide and water vapor between terrestrial ecosystems and the atmosphere provide estimates of gross primary production (GPP) and evapotranspiration (ET) at the ecosystem level and on daily to annual timescales. The ratio of these quantities represents ecosystem water use efficiency. Its multiplication with mean daylight vapor pressure...
Artificial Neural Networks (ANNs) have been successfully employed for predicting and forecasting groundwater levels up to some time steps ahead. In this paper, we present an application of feed forward neural networks (FFNs) for long period simulations of hourly groundwater levels in a coastal unconfined aquifer sited in the Lagoon of Venice, Italy. After initialising the model with groundwater...
This paper describes an assessment of the Regional Climate Model, version 3 (RegCM3), coupled to two land surface schemes: the Biosphere–Atmosphere Transfer System, version 1e (BATS1e), and the Integrated Biosphere Simulator (IBIS). The model’s performance in simulating precipitation over the Maritime Continent was evaluated against the 3-hourly Tropical Rainfall Measuring Mission (TRMM) Multis...
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