Effects of sap flow in vascular plants on the small change in ground water level in a peat mire.

维管束植物液流对泥炭沼泽地下水位微小变化的影响。

• 批准号: 10480139
• 负责人: TAKAHASHI Hidenori
• 金额: $ 5.89万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10480139/
• 关键词: High mire; Low mire; Alder forest; Sphagnum peat; Small change in ground water level; Transpiration; Sap flow in plant; Solar radiation; 蒸散流; 蒸発散量; 蒸発散能; 地下浸透量; 茎内流; 不飽和層土壌水分; 比産水率

Surface ground water in a peat mire is very important for management and land use of the mire. The aim of this study is to make clear the relationship between change of ground water level and water content in the unsaturated subsurface layer and sap flow in the vascular plants growing in the mire. The direction of sap flow was upward in the daytime, and strength of the flow had a good linear relation with solar radiation in the Tukigaumi. The direction of sap flow was downward during the night in several cases. The direction changed to downward just before sunset and changed again to upward the next morning.The effective hourly deviation (EHD) in ground water level, defined as the actual deviation in ground water level minus seepage component, was negative in the day time according to evapotranspiration. Changes in EHD during the daytime roughly corresponded to changes in solar radiation with a time lag of 1-2 hours. The EHD of ground water level became positive during the night in som … More e cases, indicating that ground water was supplied from the upper layer, the unsaturated subsurface layer and/or vegetation layers during the night. The change of EHD to positive during the night occurred simultaneously with downward sap flow in the plant, suggesting that the small rise in ground water level during the is related to the water flow in plants, not only in vascular plants but also in sphagnum. The redistribution of water between the saturated layer and unsaturated layer in a sphagnum peat subsurface layer was found after a rainfall and during the night. This redistribution of water in a peat layer is probably main reason of small rise in ground water level in a high peat mire. A detail profile of C, N, Na, Ca, Si etc. in a Sphagnum peat layer in Sarobetsu Mire showed that the chemical composition distributed evenly from surface to around 4 m in depth. This fact means that the water system in the mire was stable very long time. The redistribution of water in a sphagnum peat might contribute to the stability of the mire. Less

泥炭沼泽地的地表地下水对沼泽地的管理和土地利用具有重要意义。本研究的目的是弄清沼泽地地下水位和非饱和地下水含水量的变化与沼泽地维管植物液流的关系。白天树干液流方向向上，液流强度与太阳辐射呈良好的线性关系。在某些情况下，液流的方向在夜间是向下的。地下水位的有效小时偏差（EHD）定义为地下水位的实际偏差减去渗流分量，根据蒸散量计算，白天地下水位的有效小时偏差（EHD）为负值。白天EHD的变化与太阳辐射的变化大致对应，滞后时间为1-2小时。在某些地区，地下水位的EHD在夜间变为正值 ...更多信息 表明夜间地下水主要来源于上层、非饱和次表层和/或植被层。夜间EHD的变化与植物液流的下降同时发生，这表明地下水位的小幅上升与植物中的水流有关，不仅在维管植物中，而且在泥炭藓中。在降雨后和夜间，泥炭藓亚表层中的水分在饱和层和非饱和层之间发生了再分配。泥炭层中水分的这种再分配可能是高位泥炭沼泽地下水位上升幅度较小的主要原因。对Sarobetsu Mire泥炭层C、N、Na、Ca、Si等元素的详细分析表明，泥炭层的化学成分从表层到4 m深度分布均匀。这一事实表明，沼泽中的水系统是稳定的很长一段时间。水在泥炭藓泥炭中的重新分配可能有助于沼泽的稳定性。少

项目成果

Tarou Tsuboya: "Effect of pore structure on redistribution of subsurface water in Sarobetsu Mire, Nothern Japan"Journal of Hydrology. (In printing). (2001)

Tarou Tsuboya：“孔隙结构对日本北部 Sarobetsu Mire 地下水重新分布的影响”水文学杂志。

Hidenori Takahashi, Masayuki Kayama and Suwido H.Limin: "The effects of environmental factors on diurnal changes of ground water table in a tropical peat swamp forest."Proceedings of the International Symposium on tropical peatlands, November, 1999, Bogor

Hidenori Takahashi、Masayuki Kayama 和 Suwido H.Limin：“环境因素对热带泥炭沼泽森林地下水位日变化的影响。”热带泥炭地国际研讨会记录，1999 年 11 月，茂物

Bismart Ferry Ibie: "Photosynthetic Active Radiation Transpittance within Alder (Alnus japonica Steud) Stand in Kushiro"Proceedings of the International Symposium on tropical peatlands, November, 1999,Bogor Indonesia.. 291-297 (2000)

Bismart Ferry Ibie：“钏路桤木 (Alnus japonica Steud) 站内的光合主动辐射传输率”热带泥炭地国际研讨会论文集，1999 年 11 月，印度尼西亚茂物.. 291-297 (2000)

Harukuni Tacibana: "Biological and chemical environment of Sarobetsu Mire affected by human activities"Proceeding of the International Conference on Water, Environment, Ecology, Socio-economics and Health Engineering (WEESHE). 368-376 (1999)

Harukuni Tacibana：“受人类活动影响的 Sarobetsu Mire 的生物和化学环境”水、环境、生态、社会经济和健康工程国际会议 (WEESHE) 论文集。

Takashi Machimura: "Multiple observations on the interception and loss of rainfall by plants - applications of the rainfall balance method, the gravity balance method, the eddy correlation method and the stem energy balance method- (written in Japanese)"T

Takashi Machimura：“植物拦截和损失降雨的多重观测——降雨平衡法、重力平衡法、涡流相关法和茎能量平衡法的应用——（用日语写的）”T