• The Kahoku Experimental Watershed is located in the upstream area of the Kikuchi River.
• Measurement was started to establish the suitable plan for conservation of forested watershed and to understand its hydrological functions in warm temperate region, northern part of Kyushu Island.
• Water discharge measuerement has been conducted since 1992.
• A 50-m-high meteorological observation tower was constructed in 1999, at the center of No.2 sub-watershed to evaluate H₂O and CO₂ fluxes.

Item	Monthly precipitation	Monthly runoff
Data source〵Location	Rain gauge station	No.3 sub-watershed
※	2000-20081	2000-20081

Data source

1. SHIMIZU Takanori, KUMAGAI Tomo’omi, KOBAYASHI Masahiro, TAMAI Koji, IIDA Shin’ichi, KABEYA Naoki, IKAWA Reo, TATEISHI Makiko, MIYAZAWA Yoshiyuki, SHIMIZU Akira (2015) Estimation of annual forest evapotranspiration from a coniferous plantation watershed in Japan (2): Comparison of eddy covariance, water budget and sap-flow plus interception loss, Journal of Hydrology 522:250-264.

※ Please contact the following persons.

Location	Yamaga City, Kumamoto Pref.	Topography
River system	Kikuchi River system
Latitude	33° 08'N
Longitude	130° 43'E
Altitude (m)	140*

* Rain gauge station

	Stream No.3
Area (ha)	3.69
Altitude (m)	157 - 255
Geology	Crystal schist
Soil	Brown forest soil
Vegetation	Planted forest of Japanese cedar and cypress
Annual mean temperature (ﾟC)	15.3**
Annual precipitation (mm)	2138**

^**Averaged value for 2000 - 2008 (Shimizu et al., 2015)

Weir of No.3 sub-watershed	Rain gauge station	Observation tower
Click on a photo to enlarge.

Takanori Shimizu

Forest Hydrology Laboratory,
Department of Disaster Prevention, Meteorology and Hydrology,
Forestry and Forest Products Research Institute, Japan

Naoki Kabeya

Environmental Conservation Group,
Kyushu Research Center,
Forestry and Forest Products Research Institute, Japan