ZHANG Xin-min,ZHANG Ji-xiao,SHAN Yu-yang.Numerical Simulation of Infiltration and Cross-section Optimization under Furrow Irrigation[J].Research of Soil and Water Conservation,2014,21(01):137-141.
垄作沟灌水分入渗模拟与灌水沟断面优化
- Title:
- Numerical Simulation of Infiltration and Cross-section Optimization under Furrow Irrigation
- 分类号:
- S271
- 摘要:
- 以石羊河流域民勤地区为例，采用典型土壤实测土壤水分运动参数，应用Hydrus软件模拟不同沟型、不同垄宽条件下沟灌土壤水分运动，并研究了湿润锋推进过程，建立了沟灌土壤水分二维入渗模型，分析了灌水均匀度。结果表明：沟形相同条件下，竖向湿润锋的推进距离与沟底宽及水深呈正相关关系；水平湿润锋的推进距离由沟中水位决定；沟灌累计入渗量由灌水沟湿周的大小决定，入渗初期符合幂函数形式，入渗后期符合线性形式；同种土壤在沟深与水深相同时，V型沟横向灌水均匀度高于梯形沟，且水位越高均匀度越高。
- Abstract:
- The hydraulic parameters of the typical soil collected from Minqin in the Shiyang River valley were tested. Water movement was simulated by Hydrus software under different types of furrow and ridge width, respectively. Both wetting front and irrigation uniformity was studied, and the two-dimensional infiltration model was established. The results showed that the relationship between vertical wetting front and furrow bottom width follows a positive correlation under the same furrow type, as well as a positive relationship was found between the water depth and vertical wetting front; cumulative infiltration was determined by wetted perimeter in the furrow irrigation and was found to follow a power function and linear function at the beginning infiltration and later, respectively; both furrow depth and water depth were same, uniformity in V type was higher than in trapezoid type, the deeper water level was and the higher uniformity was for the identical soil.
参考文献/References:
[1] 张新燕,蔡焕杰,王健.沟灌二维入渗影响因素实验研究[J].农业工程学报,2005,21(9):38-41.
[2] 张永久.河西绿洲灌区春小麦垄作栽培产量效应及其影响机制的研究[D].兰州:甘肃农业大学,2006.
[3] Kostiakov A V. On the dynamics of the coefficient of water percolation in soils and on the necessity for studying it from a dynamics point of view for purposes of amelioration[J].Transactions of the Sixth Commission of International Society of Soil Science:part A, 1932,6:17-21.
[4] Hopmans J W. Stochastic description of field measured infiltration data[J]. Transactions of the ASAE,1989,32:1987-1993.
[5] Scaloppi E J, Merkley G P, Willardson L S. Intake parameters from advance and wetting phases of surface irrigation[J]. Journal of Irrigation and Drainage Engineering,1995,121(1):57-69.
[6] 聂卫波,马孝义,王术礼.沟灌入渗湿润体运移距离预测模型[J].农业工程学报,2009,25(5):20-25.
[7] 王自奎,吴普特,赵西宁,等.模拟垄沟灌溉土壤水分入渗特性试验研究[J].干旱地区农业研究,2011,29(3):24-28.
[8] 孙景生,康绍忠,崔文军.不同沟灌条件下土壤入渗参数的估算[J].灌溉排水学报,2005,24(4):46-50.
[9] 聂卫波.畦沟灌溉水流运动模型与数值模拟研究[D].陕西杨凌:西北农林科技大学,2009.
[10] ?imunek J, ?ejan M, van Genuchten M T. The HYDRUS-2D software package for simulating two-dimensional movement of water, heat and multiple solutes in variably saturated media, version 2.0[M].Colorado School of Mines,1999.
[11] 张吉孝,张新民,刘久如,等.用HYDRUS-2D和RETC数值模型反推土壤水力参数的特点分析[J].甘肃农业大学学报,2013,48(5):161-166.
备注/Memo
收稿日期:2013-05-29;改回日期:2013-07-16。
基金项目:国家自然科学基金项目（51169002）
作者简介:张新民(1965-),男,高级工程师,主要从事水文与农业水土资源方面的研究。E-mail:xmzhgs@aliyun.com