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The research aimed to study the effects of irrigation on alpine grassland during its recovery and reconstruction.

[目的]研究水分灌溉对退化高寒草原恢复重建中的作用和影响。

In addition, reasonably use reclaimed water resource and develop scientific agricultural measures can effectively pervert soil salification and basification.

此外,合理利用再生水灌溉以及制定科学的农业措施能够有效防止土壤盐碱化。

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。

In this paper, hydraulic performance tests on two sprinklers under different conditions are conducted. The two sprinklers are widely used for gardens irrigation in China, named model R50 of Rainbird Company and model PGP of Hunter company. On account of the sprinkler's structure, preliminary analysis on the tested data is also made. Based on the tested data, some advice on the best choice and layout of the sprinkler in irrigation design is presented.

文中对国内目前应用最多的两种园林灌溉喷头——美国Rainbird公司的R50型及Hunter公司的PGP型喷头作了不同工况下的水力性能测试,并结合喷头的结构对测试数据进行初步分析;在水力性能测试结果的基础上,对园林灌溉系统设计中喷头的合理选用与布置提出了几点建议。

Analysis of the archives data of Hetian region during the Republic of China showed that this time water resources basically maintained on a stable level, and it was not the decisive factor to the waste of local big area tilth, but the essential factor actually restricted the population quantity, the reclamation wasteland scale and the overall cultivated area level in all the counties.

地区人口增长过多引发对地区耕地面积的需求扩大,同时引起对耕地灌溉水量的增长需求扩大,由此呈现出农田灌溉水不足的表象,造成地区人口、耕地水平与水资源承载力相互关系的失调;即影响和田地区耕地撂荒的关键是当地水资源总量与人口规模、耕地面积总水平的平衡关系,突破这个平衡就必然引起耕地的撂荒或生态环境劣化;而诱发耕地大面积撂荒的自然因素也与过度垦荒有一定程度的关系。

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。

In boiler field, proper atomization of high viscosity liquid fuel is the essential assurance to safe .stable and high efficient combustion for boiler; in the propulsion equipment of rockers and turbo jet-propelled engine, the atomization quality of liquid fuel is the precondition to improve combustion efficiency and supply sufficient propulsion; in the field of industrial manufacture, metal powder is made by liquid metal which is impacted by high velocity gas; in the field of agricultural irrigation, the water with certain velocity is used to strike metal disk to make insufflations proportionally to the irrigation field; in the technique of desulphurization and coal gasification, proper design of nozzle is the essential factor to advance the efficiency of desulphurization and coal transformation.

在锅炉领域,高粘度液体燃料的良好雾化是锅炉安全稳定高效燃烧的重要保证;在火箭推进装置、涡轮喷气式发动机中,液体燃料的雾化质量是提高燃烧效率并产生足够推力的前提;在工业生产领域,用高速气流冲击液态金属来制备金属粉末:在农业灌溉中,用一定速度的水流冲击金属圆盘破碎并改变方向实现对灌溉区域的均匀喷洒:在烟气脱硫、煤气化等工艺中,良好的喷嘴设计是提高烟气脱硫效率和碳转化率的重要因素。

The micro lysimeters were employed to determine the process of soil evaporation of winter wheat at its growth stages under sprinkling irrigation condition.Ratios of soil evaporation to at each growing stage of winter wheat were investigated in the wheat field with different water treatments.

利用微型蒸渗仪研究了喷灌条件下冬小麦生长期间的土壤棵间蒸发过程,分析了3个不同灌溉量下的棵间蒸发占蒸散的比例及其随叶面积指数和表层土壤含水量的变化关系、灌溉后土壤蒸发的变化过程。

This study mainly focused on the water resource and environmental crisis, which are both caused by agricultural irrigation in the Inner Mongolia irrigation area. Based on the balance of total water quantity between ground water, underground water and soil water, a study was made on the water quantity in the head races and offtakes, and the effect of human activities on the water cycle was quantitatively calculated.

针对引黄灌区所面临的水资源问题及灌溉引起的环境问题,以内蒙古河套灌区为研究对象,从灌溉引水、用水、排水之间的转化关系为切入点,以地表水、土壤水和地下水之间的水量平衡理论为基础,定量研究了河套灌区在人类影响条件下的水循环特征。

Everyone wants to understand Who is their love life should not be missed Especially at night will wake up feeling more Echocardiography should not complain that there are释怀 Since you are touching the love If this is love Re-turn to stay on the brave Even if the injury even if the tears Life is gentle irrigation Oh love in the memory always understand The hearts of confused flow of tears Wait for the night there are countless If this is love At that time, if you understand Later life are happy or sad Especially in the dead of night, when think of the future Whether the calm would not want to now Just because you have a love If this is love Re-turn to stay on the brave Even if the injured Even if the tears Life is gentle irrigation Oh love in the memory always understand Confused heart The flow of tears Wait for the night there are countless If this is love If this is love

翻译得尽量像首歌的歌词附歌词:歌曲:如果爱歌手:张学友专辑:电影如果爱主题曲每个人都想明白谁是自己生命不该错过的真爱特别在午夜醒来更是会感慨心动埋怨还有不能释怀都是因为你触碰了爱如果这就是爱再转身就该勇敢留下来就算受伤就算流泪都是生命里温柔灌溉哦爱在回忆里总是那么明白困惑的心流过的泪还有数不清黑夜等待如果这就是爱如果你当时明白后来的生命里是快乐还是悲哀特别在夜深人静时想起未来是否能平静不会想现在只是因为你拥有了爱如果这就是爱再转身就该勇敢留下来就算受伤就算流泪都是生命里温柔灌溉哦爱在回忆里总是那么明白困惑的心流过的泪还有数不清黑夜等待如果这就是爱如果这就是爱

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

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