Soil Evapor ation
نویسندگان
چکیده
Soil evaporation can signifi cantly infl uence energy fl ux partitioning of partially vegetated surfaces, ultimately affecting plant transpiration. While important, quantifi cation of soil evaporation, separately from canopy transpiration, is challenging. Techniques for measuring soil evaporation exist and continually improve. The large variability in soil water content requires that there be careful thought to the design of soil evaporation measurements in the fi eld. Numerical models for simulating soil evaporation have been developed and are shown to be fairly robust. However, the required inputs for defi ning model parameters often limit their application. For many operational applications where detailed soils and ancillary weather data are unavailable or where daily evaporation values are only needed, some of the analytical models described may provide the necessary level of accuracy. Moreover, in the application of weather forecast and hydrologic models, the use of simplifi ed approaches is necessitated by the computational requirements or the lack of adequate data or both for defi ning more complex numerical model inputs. For large area estimation, the use of remotely sensed soil moisture and surface temperature offer the greatest potential for operational applications.
منابع مشابه
Effect of Polymer Concentr ation on the Structure and Performance of Polysulf one Flat Membrane for CO 2 Absorption in Membrane Contactor
متن کامل
Application of the 137 Cs technique to quantify soil redistribution rates in paleohumults from Central - South Chile
The objective of the present study was to evaluate the applicability of the 1 3 7Cs technique in obtaining spatial distributed inform ation on mean soil redistribution rates in Central-South Chile. For this purpose four fields of Palehumult soil and contrasting land use and management were selected in the Coastal Mountain Range of the 9th Region: Crop fields under subsistence and commercial man...
متن کاملSoil CO2 concentration does not affect growth or root respiration in bean or citrus
Contrasting effects of soil CO2 concentration on root respiration rates during short-term CO2 exposure, and on plant growth during long-term CO2 exposure, have been reported. Here we examine the effects of both shortand long-term exposure to soil CO2 on the root respiration of intact plants and on plant growth for bean (Phaseolus vulgaris L.) and citrus (Citrus volkainenana Tan. & Pasq.). For r...
متن کاملA BIOCHEMICAL STUDY OF SOIL ORGANIC MATTER AS RELATED TO BROTO ROOT ROT OF TOBACCO By Earle
All rights reserved INFORM ATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a com plete m anuscript and there are m issing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion.
متن کاملIn Blockination, Volatility and Growth
This paper re-examines the relationship between in ation, in ation volatility and growth using cross-country panel data for the past 30 years. With regard to the level of in ation, we nd that in contrast to current ndings which are based on cross-sectional time-average regression comparisons, exploiting the time dimension of the data reveals a strong negative correlation between in ation and in...
متن کامل