Data Set Citation:
When using this data, please cite the data package:
Shibata H.
Stream water quality in a forest basin during snowmwelt period 1997
JaLTER-Hokkaido-Kita.1388.3 (
General Information:
Title:Stream water quality in a forest basin during snowmwelt period 1997
emporal sampling (six hours interval) of stream water at the M1 basin in Uryu experimental forest (JaLTER core site) during the snowmelt period in 1997. Detailed information is available in Shibata et al. (2002) at Shibata et al. (2002) Elemental budgets of forested watershed at cold snowy region, 日本水文科学会誌 32:49-56 (in Japanese with English abstract) Detailed information for hydrological observations and the site description are found in Kobayashi (1985) at Kobayashi D (1985) Separation of the snowmelt hydrograph by stream temperature. Journal of Hydrology 76: 155-162
  • River water quality
  • Biogeochemistry
  • Ion concentration
  • Stream pH
  • snowmelt
Data Table, Image, and Other Data Details:
Metadata download: Ecological Metadata Language (EML) File
Data Table:Stream water chemistry during snowmelt period 1997 ( View Metadata | Download File download)

Involved Parties

Data Set Owners:
Individual: Hideaki Shibata
Organization:Hokkaido University
Email Address:
Data Set Contacts:
Individual: Hideaki Shibata
Organization:Hokkaido University
Email Address:

Data Set Characteristics

Geographic Region:
Geographic Description:Studied watershed
Bounding Coordinates:
West:  142.25  degrees
East:  142.25  degrees
North:  44.36  degrees
South:  44.36  degrees
Mimimum Altitude:290.0  meter
Maximum Altitude:545.0  meter
Time Period:

Sampling, Processing and Quality Control Methods

Step by Step Procedures
Step 1:

General description for study site

The studied catchments are located at the Moshiri village under a very unique metrological condition that is heavy snow and very low temperature. In winter time, the maximum snow depth is usually above 2 m and the lowest temperature is often lower than - 30 ℃. The half of an annual precipitation is brought as a snow at Moshiri. In Japan archipelago generally, a heavy snowy region (for example, northern regions faced to Japan sea) is relatively warm winter compared to the small snowy region of similar latitude and altitude. Moshiri is one of the coldest and the heaviest snowy regions in Japan.

Title:Elemental budgets of forested watershed at cold snowy region
Individual: Hideaki Shibata
Publication Date:2002
Journal:Journal of Japanese Association of Hydrological Sciences / 日本日本水文科学会誌
Page Range:49-56
Step 2:

Observation site

The observation was conducted at the M-1 basin in the Uryu Experimental Forest (UREF) of Hokkaido University (44°22' N; 142°15' E), located in the northern part of Hokkaido, Japan. The watershed area was 1.3 km2, and the altitude was 290-545 m a.s.l. The predominant bedrock is Tertiary andesite, and the soil is mainly acidic brown forest soil. The vegetation is mixed forest, and the predominant species include Abies sachalinensis, Quercus mongolica, Betula platyphylla, Acer mono, Kalopanax pictus and Phellodendron amurense. The forest floor is covered with dense bamboo (1-2 m height). The mean annual temperature in the open area of the lowland was approximately 2.5 °C, and the annual precipitation was about 1400 mm. The maximum snow depth was about 2 m on average.

Step 3:

Observation items and period

The amount of water and its chemical composition in stream water were investigated during the snowmelt period from mid-March to mid-June 1997. A gauging station was installed at the outlet of the basin, where discharge and conductivity were monitored continuously.

Step 4:

Observation methods

Discharge was determined for the continuous water stage at a 2-m wide, broad-crested weir and for a 90° V-notch, sharp-crested weir. Stream water for chemical analysis was sampled by an automatic water sampler (ISCO Co., model 2700). Automatic sampling was conducted at the lowest discharge (6:00 – 8:00) and the highest discharge (18:00 – 20:00) each day (i.e., 12 hours intervals).

Title:Separation of the snowmelt hydrograph by stream temperature
Individual: Daiji Kobayashi
Publication Date:1985
Journal:Journal of Hydrology
Page Range:155-162
Instrument(s): Automatic water sampler (ISCO Co., model 2700)
Step 5:

Chamical analysis

Electoronic conductivity (EC) and pH were both measured using electrodes (glass electrode for pH and EC meter for EC). Inorganic cations (Na, NH4, K, Ca2+, Mg2+) and anions (Cl-, NO3- and SO42-) were measured by ion chromatography (TOA Co Ltd., Japan).

Instrument(s): Ion chromatography (TOA Co Ltd., Japan).

Data Set Usage Rights

Access Control:
Auth System:JaLTER
Allow: [read] public
Additional Metadata
Metadata download: Ecological Metadata Language (EML) File