Soil water storage dynamics in peatlands with shallow water tables.
Soil water storage dynamics in peatlands with shallow water tables.
复制标题
浅水位泥炭地土壤储水动态。
DOI：
--
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
R. Gilbert
中科院分区：
文献类型：
--
作者：
D. Lapen;J. Price;R. Gilbert
时域反射计 (TDR) 用于估计纽芬兰东南部几个未开垦的覆盖沼泽和贫瘠沼泽在夏季生长季节的土壤储水动态。该研究的目的是评估地表湿度条件、蒸散量和补给过程之间的联系，以阐明控制该地区覆盖层泥炭形成的因素。地下水位以上泥炭/泥炭藓的水储存变化（ΔSWS）被发现是每日水平衡估算中的重要储存条件。沼泽和沼泽的日平均 ΔSWS 值分别约为 -0.3 和 -0.45 mm。研究还发现，i）相当高的泥炭保水能力，ii）频繁的大气补给，iii）大气对蒸散的控制，以及iv）通过毛细管和外部芯吸过程将水从浅水位输送到不饱和区有助于防止泥炭地表面的大量脱水。通过G充值...
Time domain reflectometry (TDR) was used to estimate soil water storage dynamics in several uncultivated blanket bogs and poor fens in southeastern Newfoundland during the summer growing season. The purpose of the research was to evaluate links between surface moisture conditions, evapotranspiration, and recharge processes in order to elucidate factors that govern blanket peat formation in the region. Water storage changes in the peat/Sphagnum above the water table (ΔSWS) were found to be important storage terms in daily water balance estimates. Daily mean ΔSWS values for bog and fen approximated −0.3 and −0.45 mm, respectively. It was also found that, i) fairly high peat water-holding capacities, ii) frequent atmospheric recharge, iii) atmospheric controls on evapotranspiration, and, iv) the transport of water into the unsaturated zone from the shallow water table via capillary and external wicking processes helped to preclude significant de-watering over the bulk of the peatland surfaces. Recharge via g...