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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。

It is shown from the analysis results that the average retrogradation rate of the south coastline of the Laizhou Bay during 1958 to 2004 was 27 m/a,the average retreating rate of the 0 m isobath was in the range of 27 to 65 m/a,and the average cutting rate of beach face was 2.1 cm/a.

结果表明,1958-1984年,莱州湾南岸岸线平均侵蚀后退速率为27 m/a,0 m等深线后退速率为27~65 m/a,岸滩平均蚀低速率为2.1 cm/a.1984-2004年,莱州湾南岸岸线位置基本无变化,岸滩平均蚀低速率为1.04 cm/a,水深5 m以的区域表层沉积物变粗。

Abnormal enrichment of phosphorus in mainly found to be distributed in the plain area by the factor score isopleth maps, characterized by high density of population and long history of industrial and agricultural activities.

选取四川成都盆地层土壤为研究对象,将研究区分为龙门山区、盆周丘陵区和平原区3个区,通过等值线图得出磷的大面积异常区分布在人口密度大、工农业发达的平原区。

However, in the history of Buddhism in modern society, the issue of religion does in fact signify more or less an outstanding public matter.

然而,现代中国佛教的历史,依然是或深或地表现了比较突出的公共问题。

H%Otjs%}'D$IYo%^+F0 Objective To appraise objectively the myocardial protective effect of beating heart with mild hypothermia and cardiopulmonary bypass with cardiac arrest by cold cardioplegia perfusion during openheart operation for mitral valve replacement.

目的 用体视学定量法对比分析两种二尖瓣置换术对心肌超微结构的影响,旨在为低温体外循环心脏不停跳心内直视手术对心肌保护效果作进一步客观的评价。

We will hold a royal party every night,in which everybody can communicate the experience of hypocrisy and the experts will present the skill of hypocrisy.We will wipe off the embarrassment of the jackaroo and wide the thoughtway of veteran.

在这里,我们将在每晚举行一场盛的舞宴,大家可以互相交流装B经验,还有名师谈装B技巧,在这里我们将彻底祛初上路者的紧张羞涩心理,也会给老炮儿打开全新的思路和发展空间。

On the contrary, the green light, jade piece band sparsely quality is low, prices are much cheaper.

相反,绿色,条带稀稀落落的玉件质量就低一些,价格也便宜得多了。

A white to dark green variety of jade, chiefly a metasilicate of iron, calcium, and magnesium .

软玉一种由至深的绿色玉,主要指铁、钙和镁的硅酸盐物质

They're starting to jell as a basketball club after a horrific start and now they've made a trade that's made sense to their personnel.

他们在赛季初队内很不和谐,而现在,他们做的那笔交易让所有人都受益非

The heat-reaction characteristics of Ni/Si and TiN/Ni/Si structure and the regularity for forming the NiSi film have been studied deeply and formed the excellent Ni-salicide shallow junction diode.

文中对Ni/Si和TiN/Ni/Si的热反应特性以及NiSi薄膜的形成规律进行了详细的研究。制备了优质的Ni硅化物结二极管。

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推荐网络例句

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了,但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场,你等着挨绳子吧!

Several theories about reigniting and extinguishing of the arc have been refered.

本文综合考虑了几种电弧重燃和熄灭理论。