地下灌溉

By using the HYDRUS computer program, one dimensional water salt movement was simulated under diffirent well canal combined irrigation schemes with typical irrigation regime for cropping wheat in spring and corn in late summer.

针对灌区土壤地下水位高、地下水矿化度高、潜水排泄以蒸发为主等原因，研究了基本灌溉模式、井渠结合灌溉模式的改变对不同程度盐碱地改良的效果，提出适合银北灌区不同盐碱地的灌溉制度

Suitable conditions for subsurface irrigation most often occur on glacial outwash plains, terraces, or deltas in humid or sub-humid areas.

适宜于地下灌溉的条件最常出现在冰川冲积平原、梯田或湿润、半湿润地区的三角洲地带。

The experiment comprised of twelve non-pressure subirrigation treatments and one furrow irrigation as the control.

为了制定合理的番茄无压地下灌溉制度，指导大田生产实践，利用2 a温室大棚无压地下灌溉技术的番茄种植试验，研究了番茄根系分布特性和地上部分生物量的调控效应。

In order to research technical parameters and irrigation indexes of partial rootzone non-pressure subirrigation, the law of outlet flow rate at different aperture diameters and the soil water status were analyzed through cucumber experiment in greenhouse.

为了探明根区局部控水无压地下灌溉技术参数和指标，通过在蔬菜大棚中种植黄瓜的试验，研究分析了在不同供水压力条件下的孔口出水规律和根区局部湿润状况。

Non-pressure subirrigation ; aperture outflow ; soil water content ; cucumber

无压地下灌溉；孔口出水；土壤水分；黄瓜试验

Subsurface irrigation is limited in its adaptation.

地下灌溉的适用性是有限制的。

Subsurface irrigation, also called sub-irrigation, can be considered as a controlled drainage system.

地下灌溉可以看作是一个有控制的排水系统。

Starting with the elevation of underground water resources and a safe level of mining through variable system theory, this paper analyzes the conditions of underground water resources based on the well-studied determination method of determining the two hydrographical coefficients: rainfall infiltration replenishment rate and irrigation replenishment rate. Then considering irrigation, rainfall, drainage and other related factors, a mathematical model is set up for the calculation of underground water storage,exploitation on water regulation. After analyzing the adaptability of molepipe drainage, an underground water table regulation is given out.

论文从灌区的地下水资源及其可开采量评价分析方面入手，在对两个主要的水文地质参数即降雨入渗补给系数、灌溉入渗补给系数确定方法研究的基础上，对灌区的地下水资源状况进行分析，依据灌区的灌溉、降雨、排水条件及各种现状因素，建立了地下水资源量计算的数学模型，西安理工大学工程硕士专业学位论文计算得到青铜峡灌区地下水的最大补给量和可开采量；另外对在开发利用地下水资源过程中的地下水位的调控进行了初步的探讨，在银北灌区开展对暗管排水调控地下水位的试验研究。

The most dramatic example is the Ogallala aquifer,the largest underground water source in the world.this enormous reserve runs through the agriculturally critical high plains states,from south Dakota to central texas.over-pumping for irragation has drained some parts of the aquifer dry and persistent regional drought has stifled refill by underground streams.

过多地采集地下水用于灌溉已经使地下水层的一些地方干枯，而且持续的区域性干旱也使地下河不能补充地下水层。

There are five methods of applying irrigation water to fields-flooding,furrow irrigation,sprinkling,sub-irrigation,and trickle irrigation.

有五种方法用于水利灌溉：土地漫灌，垄沟灌溉，喷洒法，地下灌溉和滴灌法。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。