基于FAO56 Penman-Monteith公式估算神农架大九湖泥炭湿地蒸散及作物系数

doi:10.13287/j.1001-9332.202005.018

应用生态学报 ›› 2020, Vol. 31 ›› Issue (5): 1699-1706.doi: 10.13287/j.1001-9332.202005.018

基于FAO56 Penman-Monteith公式估算神农架大九湖泥炭湿地蒸散及作物系数

胡晨^1,2,3, 葛继稳^1,2,3*, 许向南^1,2,3, 谭雨松^1,2,3, 袁琛皓^1,2,3

¹中国地质大学(武汉)盆地水文过程与湿地生态恢复学术创新基地, 武汉 430074;
²中国地质大学(武汉)湿地演化与生态恢复湖北省重点实验室, 武汉 430074;
³中国地质大学(武汉)生态环境研究所, 武汉 430074

收稿日期:2020-01-10 出版日期:2020-05-15 发布日期:2020-05-15
通讯作者: * E-mail: gejiwen2002@aliyun.com
作者简介:胡晨, 女, 1992年生, 硕士研究生。主要从事湿地生态学研究。E-mail: 476378560@qq.com
基金资助:
国家自然科学基金项目(31971490)资助

Estimation of evapotranspiration and crop coefficient in Dajiuhu peatland of Shennongjia based on FAO56 Penman-Monteith

HU Chen^1,2,3, GE Ji-wen^1,2,3*, XU Xiang-nan^1,2,3, TAN Yu-song^1,2,3, YUAN Chen-hao^1,2,3

¹Laboratory of Basin Hydrology and Wetland Eco-restoration, China University of Geosciences, Wuhan 430074, China;
²Hubei Key Laboratory of Wetland Evolution and Ecological Restoration, China University of Geoscience, Wuhan 430074, China;
³Institute of Ecology and Environmental Sciences, China University of Geosciences, Wuhan 430074, China

Received:2020-01-10 Online:2020-05-15 Published:2020-05-15
Contact: * E-mail: gejiwen2002@aliyun.com
Supported by:
This work was supported by the National Natural Science Foundation of China (31971490).

摘要/Abstract

摘要： 利用涡度相关法获取神农架大九湖泥炭湿地2016—2017年的蒸散数据,选用FAO56 Penman-Monteith公式及实际蒸散(ET_a)与参考蒸散(ET₀)之间的线性关系估算作物系数(K_c)值,分析泥炭湿地参考蒸散变化特征及主要影响因子,并确定以泥炭藓为主的湿地作物系数。结果表明: 2016、2017年研究区日均ET_a和ET₀值分别为1.63、1.38和1.61、1.23 mm·d^-1;影响参考蒸散的环境因子贡献从大到小依次为净辐射、空气温度、饱和水气压差、风速、相对湿度;2016年、2017年和2016—2017年生长季的K_c值分别为0.95(ET_a与ET₀线性回归的R²=0.96)、1.03(R²=0.95)、0.98(R²=0.95);2016年、2017年和2016—2017年全年的K_c值分别为0.92(R²=0.94)、0.95(R²=0.89)、0.93(R²=0.92),以泥炭藓为主的湿地K_c在0.92~1.03范围内有效。本研究确定的参数能够广泛用于以泥炭藓为主的泥炭湿地气候变化、生态系统服务和水管理等研究。

关键词: 泥炭湿地, 实际蒸散, 参考蒸散, 作物系数, Penman-Monteith公式

Abstract: We collected evapotranspiration data of Dajiuhu peatland in Shennongjia from 2016 to 2017 with eddy covariance method and estimated the value of crop coefficient (K_c) using FAO56 Penman-Monteith equation and the linear relationship between actual evapotranspiration (ET_a) and referenced evapotranspiration (ET₀). We analyzed the characteristics of referenced evapotranspiration and its main influencing factors and calculated the crop coefficient of the wetland dominated by Sphagnum. The results showed that the daily averaged ET_a were 1.63 and 1.38 mm·d^-1 in 2016 and 2017, the daily averaged ET₀ were 1.61 and 1.23 mm·d^-1 in 2016 and 2017. Environmental factors influencing ET₀ included net radiation, air temperature, vapor pressure deficit, wind speed, and relative humidity. The K_c values for the growing seasons of 2016, 2017, and 2016-2017 were 0.95 (R² of linear regression between ET_a and ET₀ was 0.96), 1.03 (R²=0.95), and 0.98 (R²=0.95). The K_c values in 2016, 2017, and 2016-2017 were 0.92 (R²=0.94), 0.95 (R²=0.89), and 0.93 (R²=0.92). K_c was effective in the range of 0.92-1.03 for the wetland dominated by Sphagnum. The identified parameters could be widely used in studies on climate change, ecosystem services, and water management in peatlands.

Key words: peatland, actual evapotranspiration, reference evapotranspiration, crop coefficient, Penman-Monteith equation

胡晨, 葛继稳, 许向南, 谭雨松, 袁琛皓. 基于FAO56 Penman-Monteith公式估算神农架大九湖泥炭湿地蒸散及作物系数[J]. 应用生态学报, 2020, 31(5): 1699-1706.

HU Chen, GE Ji-wen, XU Xiang-nan, TAN Yu-song, YUAN Chen-hao. Estimation of evapotranspiration and crop coefficient in Dajiuhu peatland of Shennongjia based on FAO56 Penman-Monteith[J]. Chinese Journal of Applied Ecology, 2020, 31(5): 1699-1706.

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基于FAO56 Penman-Monteith公式估算神农架大九湖泥炭湿地蒸散及作物系数

Estimation of evapotranspiration and crop coefficient in Dajiuhu peatland of Shennongjia based on FAO56 Penman-Monteith

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