Element analysis on Change and origin of streamwater chemistry

河水化学变化及起源的元素分析

• 批准号: 63550382
• 负责人: HIRATA Tatemasa
• 金额: $ 0.19万
• 依托单位: The National Institute for Environmental Studies
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63550382/
• 关键词: Forest ecosystem; Element cycle; Soilwater chemistry; Element content in soil; Storm runoff; Streamwater chemistry; Origin of streamwater quality

Separation of the runoff components in hydrograph is one of the final targets in the hydrological science. From the hydrochemical point of view, this is equivalent to evaluating the origin of the materials involved in the river water. Regarding the runoff from the forested basin, the inner element cycle participates in determining the streamwater chemistry.To substantiate the link between the element cycle and the streamwater chemistry, the element content in the forest soil was examined in the Tsukuba Experimental forest, in addition to the experiments for the streamwater and soilwater chemistries. It proves that such nutrients as nitrogen and calcium are highly accumulated in the surface soil due to the recycle within the intrasystem during the long formative process of the forest, contrary to this, the materials nonrelated to the element cycle become lowered in the surface soil due to blending the organic substances. These element contents in soil make out the soilwater chemistry containing the different concentration in the individual solute, and the soilwater leaching gives to the chemical changes of the streamwater in two ways of Type I and Type II during the recession period of the storm runoff. It is concluded that the element cycle in the forest ecosystem plays a prominent role in the determination of the streamwater chemistry by the soilwater leaching.

水平学中径流成分的分离是水文科学中的最终目标之一。从水化学的角度来看，这相当于评估河水所涉及的材料的起源。关于从森林盆地的径流，内部元素周期参与确定流水化学。为了证实元素周期与流水化学之间的联系，除了在Tsukuba实验林中检查了森林土壤中的元素含量，除了在溪流和土壤化学的实验。它证明，由于在森林的长长形成过程中，由于内部的回收利用在森林的长期过程中，氮和钙这样的营养在地面土壤中高度积累混合有机物质。土壤中的这些元素含量构成了含有各个溶质中不同浓度的土壤水化学物质，在暴风雨径流的经济衰退期间，土壤水浸出以两种I型和II型的化学变化给出了溪流的化学变化。结论是，森林生态系统中的元素周期在通过土壤水浸出来确定溪流化学方面起着重要作用。

项目成果

Muraoka, K. and T. Hirata: "Streamwater chemistry during rainfall events in a forested basin" J. of Hydrology. 102. 235-253 (1988)

Muraoka, K. 和 T. Hirata：“森林盆地降雨事件期间的溪流化学”水文学杂志。

Hirata,T.;K.Muraoka.: Verh.Internat.Verein.Limnol.23. 1354-1361 (1988)

平田，T.；K.Muraoka.：Verh.Internat.Verein.Limnol.23。

Hirata, T. and K. Muraoka: "Runoff of dissolved materials in Tsukuba experimental forested basin" Proc. of APD-IAHR (Environmental Hydraulics), 1988.

Hirata, T. 和 K. Muraoka：“筑波实验森林盆地中溶解物质的径流”Proc。

Hirata, T. and K. Muraoka: "Effect of element cycle on streamwater chemistry in forested basin" J. of JSCE (in Japanese). 399. 131-140 (1988)

Hirata, T. 和 K. Muraoka：“元素循环对森林盆地河流水化学的影响”J. of JSCE（日语）。

Hirata,T.and K.Muraoka: "Separation of runoff components in a small mountainous watershed using stream solute data." Verh.Internat.Verein.Limnol.23. 1354-1361 (1988)

Hirata,T. 和 K.Muraoka：“利用河流溶质数据分离小山区流域的径流成分。”