Arid
DOI10.1016/j.proenv.2013.06.074
Soil chemical aspects of water management: modeling topsoil water, salt and sodicity dynamics
van der Zee, S. E. A. T. M.; Shah, S. H. H.; Leijnse, A.
通讯作者van der Zee, S. E. A. T. M.
会议名称International Conference on Four Decades of Progress in Monitoring and Modeling of Processes in the Soil-Plant-Atmosphere System
会议日期JUN 19-21, 2013
会议地点Naples, ITALY
英文摘要

In large areas worldwide, both in semi-arid and humid climates, the availability of good quality water for primary production in agriculture or natural vegetations is limited. Whereas soil and groundwater pollution are nowadays general problems, much larger areas have to deal with the hazards of soil and groundwater salinity. For soil types that are susceptible to physical degradation in view of their swelling and shrinking behaviour, also the salinity associated hazard of soil sodicity needs to be anticipated. Sodicity related soil physical degradation may be quite irreversible and is a major candidate for preventive rather than curative measures. The process of salt displacement has received much attention, and spatial variability has been given explicit attention by Dagan and Bresler (1979). Temporal variability of the boundary conditions has been investigated only recently, when both primary and secondary salinity were studied with so-called minimalist ecohydrological modelling (Suweis et al., 2010, Shah et al., 2011, Vervoort and Van der Zee, 2012). This work emphasized the atmospheric forcing of erratic rainfall on water and salt dynamics in the rootzone layer, either envisioned as a Poisson process, or with seasonal periodicity. Taking such erratic rainfall as well as spatial variability of the depth of the groundwater level into account, an impression can be obtained of the importance of different sources of variability. For our parameterization, we find that both spatial and temporal variability were responsible for the variation in root zone salinity, C, but that root zone sodicity, expressed with the Exchangeable Sodium Percentage, ESP, depends predominantly on spatial variability. The difference is understandable from the buffering mechanisms involved with C and ESP. (C) 2013 The Authors. Published by Elsevier B.V.


英文关键词salinity sSodicity ESP spatiotemporal variability root zone model
来源出版物FOUR DECADES OF PROGRESS IN MONITORING AND MODELING OF PROCESSES IN THE SOIL-PLANT-ATMOSPHERE SYSTEM: APPLICATIONS AND CHALLENGES
ISSN1878-0296
出版年2013
卷号19
页码654-662
EISBN*****************
出版者ELSEVIER SCIENCE BV
类型Proceedings Paper
语种英语
国家Netherlands
收录类别CPCI-S
WOS记录号WOS:000326900300073
WOS关键词UNSATURATED HETEROGENEOUS SOIL ; SOLUTE-DISPERSION ; FIELD SCALE ; SYSTEMS
WOS类目Plant Sciences ; Environmental Sciences ; Soil Science
WOS研究方向Plant Sciences ; Environmental Sciences & Ecology ; Agriculture
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/302199
作者单位Wageningen Univ, Environm Sci Grp, NL-6700 AA Wageningen, Netherlands
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van der Zee, S. E. A. T. M.,Shah, S. H. H.,Leijnse, A.. Soil chemical aspects of water management: modeling topsoil water, salt and sodicity dynamics[C]:ELSEVIER SCIENCE BV,2013:654-662.
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