| 1. | The influence of soil bulk density on wetting front is related to discharge rate
土壤容重对滴灌湿润体特征值有较明显的影响。 |
| 2. | Based on the approximate estimation of wetted front edge of one dimension soil column , the design parameters of sdi were determined primarily
粘壤土湿润锋运移速度明显慢于沙土，特别是容重较大时更为明显。 |
| 3. | The results indicated that the higher the salinity of infiltration water was , the faster cumulative infiltration and wetting front increased , and more salt accumulated at the wetting front
入渗水的矿化度越高，土壤剖面含盐量越高，且湿润锋附近积聚的盐分越多。 |
| 4. | The wetting front moved nearly parallel to the soil surface , and its length could be described by a power function of time , when the distribution of initial soil water was uniform
当初始含水量分布均匀时，降雨入渗过程中湿润锋面几乎平行坡面运移，湿润锋深度与时间的关系可用幂函数描述。 |
| 5. | And compared to the vertical wetting front , the rate of horizontal wetting front was 1 . 22 times higher . different models were used to fit the movement of wetting front , it is found that the polynomial function was a good model
粘质(土娄)土，由于质地细小，在滴灌速率为2 . 67l h时，湿润锋径向移动速率远大于垂向移动速率，前者是后者的1 . 22倍。 |
| 6. | Though the desalinized depth was different under different cumulative infiltration , the ratio of desalinized depth and wetting front distance was about 0 . 342 and the ratio of desalinized depth and cumulative infiltration was 0 . 862
尽管不同湿润深度对应脱盐深度不同，但脱盐深度与湿润深度的比值却近似为0 . 342 。且脱盐深度与入渗水量的比值也近似为0 . 862 。 |
| 7. | The results showed that the lower initial soil moisture content was , the less infiltration occurred and wetting front moved slowly , and soil salt were leached more efficiently . at the same time , salt reduced in the top soil and salt accumulated at the wetting front
通过对土壤初始含水量下土壤水盐运移规律室内模拟试验研究，发现随着土壤初始含水量的增加，相同入渗历时内的累积入渗量和湿润锋都在增加。 |
| 8. | The infiltration rate in wetting front interface is speeder than that under single trickle source . the wetted soil volume shape becomes a strip which parallel lateral . the soil water content distribution under trickle source wetting front overlapping is more than that of single source
在滴头流量为5 . 3l h条件下，在相同的入渗时间内大容重土壤的水平入渗距离较低容重的土壤大27 ，而其竖直入渗距离则较小容重土壤小14 。 |
| 9. | In case of big discharge rate , the influence in horizontal is notable . however , in case of small discharge rate , the influence in vertical wetting front is notable , ( 3 ) in case of trickle source wetting front overlapping , the infiltration pattern is different from that of single trickle source infiltration
在滴头流量为2l h条件下，在相同的入渗时间内，大容重土壤的地表水平入渗距离较小容重土壤大7 ，而其垂向入渗距离则较小容重土壤小20 。 |
| 10. | Under subsurface drip irrigation , soil wetted front movement when higher soil initial moisture content was quicker than that of when it is lower , so did the supplied water pressure and soil bulk density . the wetted front movement of clay loam was clearly slow than that of sandy soil , especially in the larger soil bulk density
地下滴灌条件下，初始含水量较高的土柱，湿润锋运移速度快于含水量较低的；在较高的供水压力条件下，各个方向的湿润锋运移都比低水头情况下的快；容重越大的土柱湿润锋运移速度越缓慢。 |
