查询词典 irrigation engineer

For sustainable utilization of water resources, development of systems of well irrigation with well drainage and canal irrigation with ditch drainage was needed.

为水资源的可持续利用，要发展井灌井排渠灌沟排，以开发利用当地浅层地下水包括微咸水和咸水为基础，以引调可利用的地表水补源。

The reference crop evapotranspiration(ET0) in Guanzhong region was calculated with the Penman-Monteith equation. The change characteristics of meteorological factors and ET0 over year were analyzed. The regressing relation between ET0 and geography factors was established. Space distribution of ET0 based digital elevation model was obtained. The water consumption model of main cropes was established using the crop cofficient method. The irrigation water requirement of main crop and it's space distribution based DEM under the different precipitation probability was obtained, which advanced the calculation precision of ET0 from spot scal to regional scal. The concept of water consumption under the irrigational scal was proposed. The water consumption model of different water user and model of groundwater balance based on the water consumption of Baojixia irrigation district was established. Which can refects the relation between water utilization, water consumption and change amount of groundwater resouces.

深入分析了关中地区气象要素的变化趋势，用Penman-Montainth 公式计算了参考作物蒸发蒸腾量（ET0），建立了ET0与地理要素的多元回归关系，获得了基于数字高程模型DEM的关中地区ET0的空间分布图；用作物系数法建立了关中主要作物生育期耗水模型，获得了主要作物在不同降雨条件下的灌溉需水，以及基于DEM的主要作物灌溉需水空间分布图，提高了作物蒸发蒸腾量由点到面尺度转换过程中的估算精度；界定了灌区尺度的耗水量的概念，包括用水耗水和非用水耗水，建立了灌区耗水量计算模型及基于耗水量变化的浅层地下水均衡模型，能较好地反映灌区引水量、耗水量及地下水蓄变量之间的内在关系。

Low-pressure drip irrigation is an important direction of drip irrigation technology in the future.

因此低压滴灌将是今后滴灌技术发展的一个重要方向。

Therefore, low-pressure drip irrigation is an important direction of drip irrigation technology in the future.

然而在灌水器工作压力小于5m的低压条件下。

Malvasia grafted on rootstocks 3309C, 420A and 110R, respectively, was planted, and the physiological and biochemical responses of these scion/rootstock combinations to bilateral alternative irrigation and unilateral irrigation were studied.

利用自制木箱对嫁接在3309C、420A和110R砧木上的玛瓦斯亚葡萄进行双侧根区交替灌溉和单侧灌溉两种水分胁迫处理，以探讨不同葡萄砧穗组合对干旱的适应能力。

By using self-made wooden boxes with two separated zones, the grapevine Vitis vinifera cv. Malvasia grafted on rootstocks 3309C, 420A and 110R, respectively, was planted, and the physiological and biochemical responses of these scion/rootstock combinations to bilateral alternative irrigation and unilateral irrigation were studied.

利用自制木箱对嫁接在3309C、420A和110R砧木上的玛瓦斯亚葡萄进行双侧根区交替灌溉和单侧灌溉两种水分胁迫处理，以探讨不同葡萄砧穗组合对干旱的适应能力。

Under drip irrigation, ET was clearly affected by the threshold of soil matric potential and the irrigation frequency.

在滴灌条件下，马铃薯腾发量受土壤基质势下限的影响要比灌水频率的影响大。

This paper took the paddy soil after saving-water irrigation as the object,which is from Taian town of Yangzhou city, selected microtomy to get undisturbed soil samples respectly between two periods(before irrigation and after harvest), built up the analytical technique of numerical picture system.It also set up the analysis index of macropore structure,such as the number of macropores N, the macroporosityφ,the area A, the perimeter P and so on. Meanwhile make analysis contrast about horizonal distribution among 4cm, 6cm and 8cm scanning areas, vertical differences per 2cm unit and contrast in time between different periods.

本文选取扬州市泰安镇节水灌溉后稻田土壤为研究对象，采用切片法取开灌前和收割后的原状土样，运用数字图像制备技术，获取大孔隙数目N、大孔隙度Φ、面积A、周长P等分析指标，对4cm、6cm和8cm扫描直径内大孔隙作水平向差异性分析，对2cm单位深度上作垂向差异性分析以及对两个不同时期作时间差异性分析。

ABSTRACT Sewage irrigation is mainly referred to irrigation with sewage water from non-industrial departments, such as family, school, and ...

城市污水灌溉是指利用生活污水来灌溉农田，这主要是指从家庭、机关、学校、医院、服务行业及其它非工业部门排放的污水。

ABSTRACT Sewage irrigation is mainly referred to irrigation with sewage water from non-industrial departments, such as family, school, and eatery etc.

城市污水灌溉是指利用生活污水来灌溉农田，这主要是指从家庭、机关、学校、医院、服务行业及其它非工业部门排放的污水。

But GST= 0.156, Nm=1. 588. As a result, the foundation of Youyongchi Avicennia marina population was the result of the migration of hypocotyles and human factors.

这项工作可以为海岸防护林中新引进种类的判定以及为研究种群建立者效应方法的确定提供科学依据。

The two-dimensional CDRC-ADI-FDTD update equations for collision unmagnetized plasma are induced. The unconditional stability of the CDRC-ADI-FDTD formulation for collision unmagnetized plasma is obtained by the examples.

推导了碰撞非磁化等离子体中的二维CDRC-ADI-FDTD迭代公式，并用算例验证了碰撞非磁化等离子体CDRC-ADI-FDTD算法也是无条件稳定的。