| General Information: |
| Title: | Stream chemistry
(ja)
河川水質 |
| Identifier: | JaLTER-Hokkaido-Kita.295.10 |
| Abstract: |
We collected stream waters at the outlet of several watersheds in Uryu Experimental Forest. In each watershed, different forest management was conducted: clear-cutting, scarification, scarification with soil-replacement. Control(non-treatment) watershed was also established. After bringing samples to the laboratory, we measured pH and electric conductivity (EC), and then filtered the water samples using glass fiber filter (GF/F: 0.7μm) and kept it below 4 degree-C prior to further chemical analysis. We analyzed the concentrations of ions (Cl-, NO3-, SO42-, Na+,NH4+,K+,Mg2+,Ca2+) by using ionchromatography (Dionex, DX-500, ICS-1100) after the additional filtering with a 0.2 μm membrane filter.
(ja)
雨龍研究林内の泥川上流域にある複数の集水域の出口において河川水を採水した．それぞれの集水域においては異なる森林施業：皆伐，ササ掻き起こし，表土戻しが行われた。何も処理を行わない対照区も設けられた。採取後、実験室に持ち帰り、pH, 電気伝導度(EC)を測定した。サンプル水はガラス繊維濾紙（GF/F: 0.7μm）を用いて速やかにろ過後，化学分析までの期間4℃以下で保存した．さらに0.2μmメンブレインフィルターでろ過後、ろ液のイオン成分（Cl-, NO3-, SO42-, Na+,NH4+, K+,Mg2+,Ca2+）をイオンクロマトグラフィー（Dionex, DX-500, ICS-1100）を用いて分析した。
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| Keywords: |
- stream water quality
(ja)
河川水質
- impact of forest management
(ja)
森林施業の影響
- forested watershed
(ja)
森林集水域
- ion
(ja)
イオン成分
- nitrate
(ja)
硝酸イオン
- pH
(ja)
pH
- electric conductivity
(ja)
電気伝導度
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Involved Parties
| Data Set Owners: |
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Individual: | Karibu Fukuzawa
(ja)
福澤加里部 |
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Organization: | Forest Research Station, Field Science Center for Northern Biosphere, Hokkaido University
(ja)
北海道大学北方生物圏フィールド科学センター森林圏ステーション |
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Position: | Assistant Professor
(ja)
助教 |
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Address: |
| 483 Otoineppu, |
| Otoineppu, Hokkaido 098-2501 Japan |
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(ja)
日本 098-2501 北海道 中川郡音威子府村 |
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(ja)音威子府483 |
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Phone:
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| +81-1656-5-3216 / 01656-5-3216 (voice) |
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Phone:
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| +81-1656-5-3218 / 01656-5-3218 (fax) |
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Email Address:
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Web Address:
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| Data Set Contacts: |
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Individual: | Karibu Fukuzawa
(ja)
福澤加里部 |
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Organization: | Forest Research Station, Field Science Center for Northern Biosphere, Hokkaido University
(ja)
北海道大学北方生物圏フィールド科学センター森林圏ステーション |
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Position: | Assistant Professor
(ja)
助教 |
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Address: |
| 483 Otoineppu, |
| Otoineppu, Hokkaido 098-2501 Japan |
|
(ja)
日本 098-2501 北海道 中川郡音威子府村 |
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(ja)音威子府483 |
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Phone:
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| +81-1656-5-3216 / 01656-5-3216 (voice) |
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Phone:
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| +81-1656-5-3218 / 01656-5-3218 (fax) |
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Email Address:
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Web Address:
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Data Set Characteristics
| Geographic Region: |
| Geographic Description: | DE0 sampling point / DE0採水地点 |
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Bounding Coordinates:
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| West: | 142.203508632 degrees
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| East: | 142.203508632 degrees
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| North: | 44.418876993 degrees
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| South: | 44.418876993 degrees
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| Geographic Region: |
| Geographic Description: | DE1 sampling point / DE1採水地点 |
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Bounding Coordinates:
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| West: | 142.203876155 degrees
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| East: | 142.203876155 degrees
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| North: | 44.4204698591 degrees
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| South: | 44.4204698591 degrees
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| Geographic Region: |
| Geographic Description: | DE2 sampling point / DE2採水地点 |
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Bounding Coordinates:
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| West: | 142.205610643 degrees
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| East: | 142.205610643 degrees
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| North: | 44.4237739401 degrees
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| South: | 44.4237739401 degrees
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| Geographic Region: |
| Geographic Description: | DE3 sampling point / DE3採水地点 |
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Bounding Coordinates:
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| West: | 142.205589206 degrees
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| East: | 142.205589206 degrees
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| North: | 44.4243420436 degrees
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| South: | 44.4243420436 degrees
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| Geographic Region: |
| Geographic Description: | DE4 sampling point / DE4採水地点 |
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Bounding Coordinates:
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| West: | 142.205888206 degrees
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| East: | 142.205888206 degrees
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| North: | 44.4250811927 degrees
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| South: | 44.4250811927 degrees
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| Geographic Region: |
| Geographic Description: | DE5 sampling point / DE5採水地点 |
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Bounding Coordinates:
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| West: | 142.206424706 degrees
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| East: | 142.206424706 degrees
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| North: | 44.4280347127 degrees
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| South: | 44.4280347127 degrees
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| Geographic Region: |
| Geographic Description: | DE6 sampling point / DE6採水地点 |
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Bounding Coordinates:
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| West: | 142.207263454 degrees
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| East: | 142.207263454 degrees
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| North: | 44.4304365405 degrees
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| South: | 44.4304365405 degrees
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| Geographic Region: |
| Geographic Description: | DE7 sampling point / DE7採水地点 |
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Bounding Coordinates:
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| West: | 142.207622604 degrees
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| East: | 142.207622604 degrees
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| North: | 44.4315944515 degrees
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| South: | 44.4315944515 degrees
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| Geographic Region: |
| Geographic Description: | DE8 sampling point / DE8採水地点 |
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Bounding Coordinates:
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| West: | 142.206764696 degrees
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| East: | 142.206764696 degrees
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| North: | 44.430626047 degrees
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| South: | 44.430626047 degrees
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| Geographic Region: |
| Geographic Description: | DE9 sampling point / DE9採水地点 |
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Bounding Coordinates:
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| West: | 142.207859345 degrees
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| East: | 142.207859345 degrees
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| North: | 44.4349655905 degrees
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| South: | 44.4349655905 degrees
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| Geographic Region: |
| Geographic Description: | DEU sampling point / DEU採水地点 |
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Bounding Coordinates:
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| West: | 142.207446495 degrees
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| East: | 142.207446495 degrees
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| North: | 44.4315090835 degrees
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| South: | 44.4315090835 degrees
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Sampling, Processing and Quality Control Methods
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Step by Step Procedures
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| Step 1: |
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Description:
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Water Sampling / 採水
We collected water at the outlet of watersheds. Interval of the sampling during non-snowy season was 1-2 weeks until 2010, and then 1 month. During snowy season, the interval was 1 month.
(ja)
集水域末端にて河川水を採取した。サンプリング間隔（無雪期）は2010年までは1-2週間,2011年以降は1カ月間隔とした。積雪期には1カ月間隔とした。
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| Step 2: |
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Description:
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Filterling and chemical analysis / ろ過と化学分析
After bringing to the laboratory, we measured pH and electric conductivity (EC). Then, we filtered water sample through glass fiber filter (Whatman, GF/F: 0.7μm) and stored below 4 degree-C until further processing. We analyzed the concentration of anion (Cl-, NO3-, SO42-) and cation (Na+, NH4+, K+, Mg2+, Ca2+) by using ion chromatography after the additional filtering with a 0.2 μm membrane filter.
(ja)
実験室に持ち帰り、pHと電気伝導度を測定した。その後ガラス繊維濾紙（ワットマン， GF/F: 0.7μm）を用いてろ過し、ろ液は分析までの期間4℃以下で保存した。さらに0.2μmメンブレインフィルターでろ過後、イオンクロマトグラフィーを用いて陰イオン（塩化物イオン，硝酸イオン，硫酸イオン）、陽イオン（ナトリウムイオン，アンモニウムイオン，カリウムイオン，マグネシウムイオン，カルシウムイオン）濃度を分析した。
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Instrument(s):
| pH meter (DKK-TOA, HM-30V)
EC meter (DKK-TOA, CM-30S)
Ion chromatography (Dionex, DX-500, ICS-1100) / pH計（東亜ディーケーケー，HM-30V）
EC計（東亜ディーケーケー，CM-30S）
イオンクロマトグラフィー（Dionex, DX-500, ICS-1100） |
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Data Set Usage Rights
Follows to Data Policy of JaLTER Network.
(ja)
JaLTERネットワークのデータポリシーに従う。 |
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