Abstract

Authors

Tamai, K., Kominami, Y., Miyama, T., Goto, Y.

Year

2005

Title

山地小流域における地温、土壌含水率からの土壌呼吸量時系列データの推定とその空間変動−京都府南部における風化花崗岩地域の場合−
The Estimation of Time Series Data for Soil Respiration Based on Soil Temperature and Soil Moisture Content Ratio and Its Spatial Variations in a Small Mountainous Catchment : In the Case of Weathered Granite Region in Southern Kyoto Prefecture

Journal

日本森林学会誌 (Journal of the Japanese Forest Society)

Volume

87(4)

Page

331-339

DOI


Keywords

時系列データ 地温 土壌含水率 土壌呼吸 複雑地形
complex terrain, soil moisture content ratio, soil respiration, soil temperature, time series data

URL

http://ci.nii.ac.jp/naid/110006278793

Abstract

複雑地形に位置することの多い日本の山地小流域において,土壌呼吸量の時系列データとその空間変動に関する研究はきわめて少ない。そこで山地小流域(1.6ha)において,96個のソイルカラーを対象に土壌呼吸量測定を行った。これらの観測値と地温,土壌水分の関係を地形部位の違いにもかかわらず一つの関数式で表すことができた。流域内の他に設置された264個のソイルカラーを対象とした観測値によってこの関数式を検証したところ,計算値との相対誤差は25%の精度で一致した。この関係式と流域内5カ所における地温,土壌含水率のモニタリングデータから,日単位での土壌呼吸量の時系列データを推定した。これら5地点における日土壌呼吸量の空間変動はほぼ同時に増減し,1年を通じて日平均土壌呼吸量に対して50〜140%の範囲で推移した。
There are few studies with the time series data for soil respiration and its spatial variation in a small mountainous catchment which is located on the complex terrain in Japan, generally. Soil respiration rate was measured at 96 soil colors in the small mountainous catchment (1.6ha) in this study. The relation between soil temperature, soil moisture content ratio and measured soil respiration rate was expressed by one function in spite of the fact that the measured places were located in different topographical parts. To verify this function, soil respiration rate was measured at another 264 soil colors in the same catchment. The relative difference between calculated and measured soil respiration rate was 25%. The time series data for daily soil respiration was estimated by this function used with the monitoring data for soil temperature and soil moisture content ratio at 5 places in this catchment. These daily soil respiration rates fluctuated at almost the same time and their relative variation ranges between 50 and 140% in one year.

Site

YMS

Remarks

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