DNF: Danongdafu Forest Plantation Site
General site details
| Site name | Danongdafu Forest Plantation Site |
|---|---|
| AsiaFlux site code | DNF |
| Location | Guangfu Township, Hualien |
| Position | 23.6261N, 121.415E |
| Elevation | 155 m above sea level |
| Slope | 1.5 deg |
| Terrain type | Flat |
| Area | 220 ha |
| Fetch | 600-1000 m |
| Climate | Cfa |
| Mean annual air temperature | 22.2 degC (1997-2019) |
| Mean annual precipitation | 2159 mm (1997-2019) |
| Vegetation type | Each patch of an individual tree species was planted in a single or multiple column(s) in a homogenous manner. |
| Dominant Species (Overstory) | Formosan acacia (Acacia confusa) Formosan alder (Alnus formosana) Autumn maple tree (Bischofia javanica) Camphor tree (Cinnamomum camphora) Indonesian cinnamon (Cinnamomum burmannii) Common elaeocarpus (Elaeocarpus decipiens) Formosan ash (Fraxinus griffithii) Taiwanese rain tree (Koelreuteria elegans) Formosan gum (Liquidambar formosana) Beadtree (Melia azedarach) Formosan michelia (Michelia compressa) Pongam tree (Millettia pinnata) Phoebe zhennan Rose wood (Pterocarpus indicus) Wingleaf soapberry (Sapindus saponaria) Chinese tallow tree (Triadica sebifera) Taroko zelkova (Zelkova serrata) |
| Dominant Species (Understory) | Fern, Poaceae |
| Canopy height | About 16 m in 2024 |
| Age | Around 23 year old in 2024 |
| LAI | 2.0 |
| Soil type | Typic Dystrudepts |
Observation
Eddy Covariance method (CO2)
| System | Open-path |
|---|---|
| Wind speed | Three-dimensional sonic anemometer-thermometer (CSAT3, Campbell Scientific) |
| Air temperature | Three-dimensional sonic anemometer-thermometer (CSAT3, Campbell Scientific) |
| Water vapor | Open-path CO2/H2O analyzer (LI-7500DS, LI-COR Environmental) |
| CO2 | Open-path CO2/H2O analyzer (LI-7500DS, LI-COR Environmental) |
| Measurement height | 24.5 m |
| Sampling frequency | 10 Hz |
| Averaging time | 30 min |
| Data logger | Smartflux 3 (LI-COR Environmental) |
| Data storage | USB flash memory |
| Original data | Raw data |
Meteorology
| Observation items | Levels/Depth | Instrument |
|---|---|---|
| Global solar radiation(incoming) | 22.5 m | Pyranometer (NR01 4-component net radiometer, Hukseflux) |
| Global solar radiation (outgoing) | 22.5 m | Pyranometer (NR01 4-component net radiometer, Hukseflux) |
| Long-wave radiation(incoming) | 22.5 m | Pyranometer (NR01 4-component net radiometer, Hukseflux) |
| Long-wave radiation(outgoing) | 22.5 m | Pyranometer (NR01 4-component net radiometer, Hukseflux) |
| Net radiation | 22.5 m | NR01 4-component net radiometer, Hukseflux |
| PPFD (incoming) | 22.5 m | Quantum sensor (LI-190S, LI-COR Biosciences ) |
| Air temperature | 20.4 m | Platinum resistance thermometer and capacitive hygrometer (HMP155, Vaisala) |
| Humidity | 20.4 m | Platinum resistance thermometer and capacitive hygrometer (HMP155, Vaisala) |
| Soil temperature | 0.10 m | Acclima True TDR-315H (Acclima) |
| Soil heat flux | 0.10 m | Heat flux plate (HFP01sc, HukseFlux) |
| Soil water content | 0.10 m | Acclima True TDR-315H (Acclima) |
| Wind speed | 24.6 m | Wind Monitor (Wind Monitor 05305, R.M. Young) |
| Wind direction | 24.6 m | Wind Monitor (Wind Monitor 05305, R.M. Young) |
| Barometric pressure | 19.0 m | Barometer (092 Barometer Pressure Sensor, Met-One Inst.) |
| CO2 concentration | 24.5 m | Open-path CO2/H2O analyzer (LI-7500DS, LI-COR Environmental) |
Other
| Ecological investigation | Vegetation composition, Animals by camera traps |
| Sapflow Velocity Measurement | Continuous monitoring on 8 dominant tree species since 2022 by homemade Arduino-based heat-pulse sapflow system |
Observation Period and Data Availability
| Measurement Period | August 2018 to present |
|---|---|
| Measurement Frequency | Continuous |
| Data Availability |
Contact
Shih-Chieh Chang (scchang [at] gms.ndhu.edu.tw)
Department of Natural Resources and Environmental Studies,
College of Environmental Studies and Oceanography,
National Dong Hwa University
No.1, Sec.2, Da Hsueh Rd., Shoufeng, Haulien 97401, Taiwan.
Tel: +886-3-890-3275
Cheng-Wei Lai (cwlai [at] gms.ndhu.edu.tw)
Department of Natural Resources and Environmental Studies,
College of Environmental Studies and Oceanography,
National Dong Hwa University
No.1, Sec.2, Da Hsueh Rd., Shoufeng, Haulien 97401, Taiwan.
Tel: +886-3-890-3270
Infrastructure
Tower, Electrical power (AC), Facilities for communication (4G LTE)
Research Fund
(1) Grant-in-Aid for Scientific Research (Nos.113-2621-M-259-003,
112-2621-M-259-016, 111-2621-M-259-004) from the National Science and
Technology Council, Taiwan (2022-2025)
(2) Grant-in-Aid for Scientific Research (Nos. 104F002 and 107F002) from Cheng-Yung
Foundation, Taiwan (2015-2025)
(3) Grant-in-Aid for Scientific Research (Nos. 112-2740-M-259-002 and
113-2740-M-259-003) from the National Science and Technology Council, Taiwan
(2023-2025)
(4) Grant-in-Aid for Scientific Research (Nos. 112-2740-M001-007 and
113-2740-M001-006) from the National Science and Technology Council, Taiwan
(2023-2025)
Calibration Information
Calibration of open-path analyzer approximately every 1.5-2 years with standard CO2 gas and a dew point generator (LI610, LI-COR Environmental)