干旱區(qū)棗園土壤水深層滲漏數(shù)值模擬研究.pdf

1、新疆農(nóng)業(yè)大學(xué)碩士學(xué)位論文干旱區(qū)棗園土壤水深層滲漏數(shù)值模擬研究姓名：任玉忠申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：水文學(xué)及水資源指導(dǎo)教師：姜卉芳2010-06II Numerical Simulation of Soil Water Deep Percolation of a Jujube Orchard in Arid Region Abstract This study relying on the Project Supported by Nat

2、ional Technology“Integrated and Demonstrated Water Saving Technology of Modern Agriculture in Arid Region“,the jujube is the object of study in the Experimental Forestry Centre in Aksu Area,in order to discuss the charac

3、teristic of deep percolation and the law of water consumption under the irrigation and so on,through measuring soil water content by TRIME and Hydra system,measuring deep percolation by the tray of incepted seepage water

4、,measuring LAI by TRAC,measuring meteorological factors by Vantage pro2 automatic meteorological station and so on, experimention of deep percolation was carried out.Based on the experimention,the characteristic of deep

5、percolation,law of water consumption and translation of irrigation quota were simulated and analyzed with the HYDRUS-1D;In order to sieve appropriate micro-irrigation method for grown jujube,through measuring the leaf,di

6、ameter of jujube crown and else growth index,measuring yield actually,measuring the appearance,sapor and nutrition of fruit and else quality index,experimention of micro-irrigation method was carried out,then united the

7、characteristic of water consumption and deep percolation volumes by simulated,effects of different irrigation methods on jujube were analyzed,it’s important significance to exactly estimate the deep percolation of soil w

8、ater and sieve appropriate irrigation method.The main research results summarized as following: （1）Based on the data obtained from experiment,a one-dimensional model（HYDRUS-1D）of soil water moving was developed,results o

9、f simulation were verified and shows that,the results of simulation represent preferably the field soil water movement.So the deep percolation of soil water analyzed with HYDRUS-1D model is viably. （2）Compared with perco

10、lation volumes of different calculational methods,it shows that,the simulated result and calculational value of soil water balance equation are exacter under surface irrigation,irrigated excessly result in the deep perco

11、lation of soil water very serious,the cumulate quantity of deep percolation were 1124.0mm and 1032.4mm respectively,which account for about 60.0% and 55.1% of the total amount of irrigation respectively;The simulated res

12、ult on the high side,the calculational value of soil water balance equation and measured value actually are exacter under surface drip irrigation,the cumulate quantity of deep percolation were 103.4mm and 116.9mm,which a

13、ccount for about 10.9% and 12.3% of the total amount of irrigation respectively,two times of surface irrigation are the main reason for deep percolation and it adopted the method of high frequency and little irrigation q