干旱区生态环境知识资源中心(Arid): 基于温度示踪法的典型农渠渠道渗漏模拟研究

Arid

	基于温度示踪法的典型农渠渠道渗漏模拟研究
其他题名	Simulation of Typical Canal Seepage Based on Temperature Tracer Method
	潘维艳; 普薇如; 黄权中; 黄冠华
来源期刊	农业机械学报
ISSN	1000-1298
出版年	2017
卷号	48 期号:5 页码:251-257
中文摘要	以渠道渗漏土壤水动态及热伴生机理为理论基础,利用热示踪技术,选取内蒙古河套灌区典型农渠开展野外监测、原位热示踪试验,利用温度示踪结果定性分析渠系渗漏过程。利用二维水热运移数值模型VS2D对渠道渗漏条件下饱和/非饱和土壤的水热迁移过程进行模拟,反演出试验区粉砂壤土和砂壤土的饱和水力传导度分别为0.025 m/d和0.6 m/d。通过静水试验数据对模型进行验证,结果表明,温度模拟值和实测值的平均均方根差(RMSE)和平均相对误差(MRE)分别为1.6℃和2.5%,累积入渗量实测值与模拟值的相对误差为2.4%,模拟结果与实际监测数据吻合较好。研究结果表明,温度信号可用来对渠系的渗漏状况进行示踪和监测,VS2D模型模拟土壤水热运移的结果能够为灌区的渠道渗漏问题提供科学依据,可为我国北方旱区灌区水资源的管理以及渠系节水改造工程提供一定的理论和技术支持。
英文摘要	Canal seepage is of great concern because of the water shortage and efficient use of irrigation water resource in many irrigation districts. To investigate the infiltration loss, heat was used as a natural tracer to characterize the canal seepage during irrigation channels conveyance. The field experiment was carried out in a typical canal located in Hetao Irrigation District. Time-domain reflectometer and thermal sensors were used to monitor the soil moisture content and temperature around the typical cannel. The tracer experiment indicated that temperature changes in the shallow sediments characterized canal seepage properties. Based on the interactions between groundwater and surface water temperature, temperature changes can derive the river flow even without water level data. Two-dimensional water and heat model, VS2D, was applied to simulate the dynamic process of water and heat in the saturated and unsaturated soils. And the soil hydraulic parameters, including saturated water content and hydraulic conductivity were inversed by the VS2D model. The hydraulic conductivity was 0.025 m/d for the silt loam and 0.6 m/d for the loamy sand soil in the experiment area, respectively. The simulation results were verified based on the results of the observation experiment. The values of root mean square error (RMSE) and mean relative error (MRE) between simulated and measured temperatures were 1.6℃ and 2.5%, respectively, indicating an accurate simulation. The relative mean error between predicted accumulative infiltration amount and actual value was 2.4% and the accuracy could meet the requirement. The results suggested that heat as a tracer was reliable for monitoring of water transport during canal seepage. Heat as a tracer provided a convenient and accurate way to monitor the infiltration loss during irrigation channels conveyance, which would be beneficial to irrigation management in the arid irrigation district in North China.
中文关键词	渠系渗漏 ; 温度示踪 ; VS2D模型 ; 数值模拟
英文关键词	canal seepage temperature tracer VS2D model numerical simulation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURAL ENGINEERING ; AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5991894
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236356
作者单位	中国农业大学中国-以色列国际农业研究培训中心, 北京 100083, 中国
推荐引用方式 GB/T 7714	潘维艳,普薇如,黄权中,等. 基于温度示踪法的典型农渠渠道渗漏模拟研究[J]. 中国农业大学,2017,48(5):251-257.
APA	潘维艳,普薇如,黄权中,&黄冠华.(2017).基于温度示踪法的典型农渠渠道渗漏模拟研究.农业机械学报,48(5),251-257.
MLA	潘维艳,et al."基于温度示踪法的典型农渠渠道渗漏模拟研究".农业机械学报 48.5(2017):251-257.