太行山典型油松林降雨再分配规律
S715.2; 森林降雨再分配过程是水循环的一个重要环节,对区域产水及水资源的形成过程有重要意义.本研究于2022年7-11月对太行山典型油松林降雨再分配要素进行观测,阐明油松林降雨再分配的基本规律,利用修正的Gash模型和Liu模型对林冠截留量进行模拟.结果表明:研究期间林外降雨量为450.8 mm,油松林林冠截留量、穿透雨量、树干径流量分别为105.5 mm、338.2 mm、7.1 mm,分别占总降雨量的23.4％、75.0％、1.6％.基于修正的Gash模型计算得到林冠截留量、穿透雨量、树干径流量分别为105.3 mm、340.7 mm、4.6 mm,实测值与模拟值的相对误差分别为0....
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| Published in | 中国生态农业学报（中英文） Vol. 31; no. 12; pp. 2011 - 2021 |
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| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国科学院遗传与发育生物学研究所农业资源研究中心/中国科学院农业水资源重点实验室 石家庄 050022
01.12.2023
中国科学院大学现代农业科学学院 北京 100049%中国科学院遗传与发育生物学研究所农业资源研究中心/中国科学院农业水资源重点实验室 石家庄 050022 |
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| Online Access | Get full text |
| ISSN | 2096-6237 |
| DOI | 10.12357/cjea.20230172 |
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| Abstract | S715.2; 森林降雨再分配过程是水循环的一个重要环节,对区域产水及水资源的形成过程有重要意义.本研究于2022年7-11月对太行山典型油松林降雨再分配要素进行观测,阐明油松林降雨再分配的基本规律,利用修正的Gash模型和Liu模型对林冠截留量进行模拟.结果表明:研究期间林外降雨量为450.8 mm,油松林林冠截留量、穿透雨量、树干径流量分别为105.5 mm、338.2 mm、7.1 mm,分别占总降雨量的23.4％、75.0％、1.6％.基于修正的Gash模型计算得到林冠截留量、穿透雨量、树干径流量分别为105.3 mm、340.7 mm、4.6 mm,实测值与模拟值的相对误差分别为0.2％、0.8％、34.7％;修正的Liu模型计算得到林冠截留量为96.0 mm,实测值与模拟值的相对误差为9.0％;修正的Gash模型相比于Liu模型模拟结果相对误差更低,模拟效果更好.修正的Gash模型参数敏感性排序:林冠平均蒸发速率＞平均降雨强度＞林冠持水能力＞冠层盖度＞树干持水能力＞树干径流系数.综上,太行山典型油松林可截留23.4％的降雨,这对评估区域水资源量具有重要意义,且修正的Gash模型在太行山油松林有很好的适用性,可用于预测油松林林冠截留量变化. |
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| AbstractList | S715.2; 森林降雨再分配过程是水循环的一个重要环节,对区域产水及水资源的形成过程有重要意义.本研究于2022年7-11月对太行山典型油松林降雨再分配要素进行观测,阐明油松林降雨再分配的基本规律,利用修正的Gash模型和Liu模型对林冠截留量进行模拟.结果表明:研究期间林外降雨量为450.8 mm,油松林林冠截留量、穿透雨量、树干径流量分别为105.5 mm、338.2 mm、7.1 mm,分别占总降雨量的23.4％、75.0％、1.6％.基于修正的Gash模型计算得到林冠截留量、穿透雨量、树干径流量分别为105.3 mm、340.7 mm、4.6 mm,实测值与模拟值的相对误差分别为0.2％、0.8％、34.7％;修正的Liu模型计算得到林冠截留量为96.0 mm,实测值与模拟值的相对误差为9.0％;修正的Gash模型相比于Liu模型模拟结果相对误差更低,模拟效果更好.修正的Gash模型参数敏感性排序:林冠平均蒸发速率＞平均降雨强度＞林冠持水能力＞冠层盖度＞树干持水能力＞树干径流系数.综上,太行山典型油松林可截留23.4％的降雨,这对评估区域水资源量具有重要意义,且修正的Gash模型在太行山油松林有很好的适用性,可用于预测油松林林冠截留量变化. |
| Abstract_FL | The Taihang Mountain Region is the ecological barrier and water source of North China Plain.In recent decades,with the implementation of Taihang Mountains Greening Project and other projects,the vegetation coverage in Taihang Mountain Region is recovering continuously,but the runoff in the mountains is rapidly declining.The mechanism of how the vegetation restoration af-fects the water yield is not clear.The process of rainfall partitioning is an important part of hydrological cycle.It is of great signific-ance for the formation process of regional water yield and water resources.Pinus tabulaeformis is the main afforestation tree species in Taihang Mountain Region,and it affects regional water resources.The rainfall partitioning ofP.tabulaeformis forest in Taihang Mountain Region remains poorly understood.It is required to assess the applicability of the revised Gash model and revised Liu mod-el.In this study,the rainfall partitioning in P.tabulaeformis forest is examined from July to November of 2022.The canopy intercep-tion was simulated by revised Gash model and revised Liu model.The results showed that 1)the rainfall amount was 450.8 mm dur-ing the study period,the average rainfall duration was 10.4 h,and the average rainfall intensity was 2.7 mm·h-1.Furthermore,we found that the rainfall during the study period was mainly light rain.The canopy interception,throughfall and stemflow of P.tabulae-formis forest were 105.5,338.2 and 7.1 mm,respectively,accounting for 23.4％,75.0％and 1.6％of the rainfall amount.2)Through-fall and stemflow began to occur when the rainfall amount reached 1.7 and 5.5 mm,respectively.Significant linear relationships were found between the rainfall amount and throughfall amount.However,the relationship between rainfall amount and interception fol-lowed a power function.The throughfall percentage increased quickly with increasing rainfall amount,but when rainfall amount reached 11 mm,the throughfall percentage increased slowly.The interception percentage firstly decreased and then stabilized with in-creasing rainfall amount.3)Based on the revised Gash model,the canopy interception,throughfall,and stemflow were calculated to be 105.3,340.7,and 4.6 mm,respectively.The relative errors between the measured and simulated values were 0.2％,0.8％,and 34.7％.According to the revised Gash model simulation results,we found that the interception amount was dominated by canopy evaporation during rainfall,accounting for 55.0％of the interception simulation,followed by evaporation after cessation of rainfall,accounting for 27.8％of the interception simulation.The revised Liu model calculated the interception as 96.0 mm,with a relative er-ror of 9.0％between the measured and simulated values.The revised Gash model had lower relative errors in the simulation than the Liu model.4)Sensitivity of the revised Gash model parameters were mean evapotranspiration rate＞mean rainfall intensity＞can-opy storage capacity＞canopy cover＞trunk storage capacity＞stemflow coefficient.These results indicate that typical P.tabulae-formis forests in the Taihang Mountains can intercept 23.4％of rainfall,with 75.0％throughfall and 1.6％stemflow.The revised Gash model can be used to predict canopy interception in P.tabulaeformis forests and provides a theoretical basis for water resource assess-ment and water conservation capacity improvement in mountainous areas. |
| Author | 曹建生 郭波 阳辉 朱春雨 李佳聪 赵宇寒 沈彦俊 |
| AuthorAffiliation | 中国科学院遗传与发育生物学研究所农业资源研究中心/中国科学院农业水资源重点实验室 石家庄 050022;中国科学院大学现代农业科学学院 北京 100049%中国科学院遗传与发育生物学研究所农业资源研究中心/中国科学院农业水资源重点实验室 石家庄 050022 |
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| Author_FL | YANG Hui LI Jiacong ZHU Chunyu SHEN Yanjun ZHAO Yuhan GUO Bo CAO Jiansheng |
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| DOI | 10.12357/cjea.20230172 |
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| DocumentTitle_FL | Rainfall partitioning patterns by Pinus tabulaeformis forest in Taihang Mountains |
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| Keywords | 太行山 Rainfall partitioning 降雨再分配 油松林 Taihang Mountains Pinus tabulaeformis forest Interception Interception models 截留模型 林冠截留 |
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| Snippet | S715.2; 森林降雨再分配过程是水循环的一个重要环节,对区域产水及水资源的形成过程有重要意义.本研究于2022年7-11月对太行山典型油松林降雨再分配要素进行观测,阐明油松林降雨再分配的基本规律,利用修正的Gash模型和Liu模型对林冠截留量进行模拟.结果表明:研究期间林外降雨量为450.8... |
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| Title | 太行山典型油松林降雨再分配规律 |
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