由于地下水位下降,灌溉井干涸,居于世界之首的中国小麦产量,已经从1997年1.23亿吨的峰值下降了8%。
As water tables have fallen and irrigation wells have gone dry, China's wheat crop, the world's largest, has declined by 8% since it peaked at 123 million tons in 1997.
自从水资源保护项目在村里的开展和地下水位的提升,这口井在旱季也能为作物灌溉提供水源。
As the conservation program has progressed in the village and the water table has risen, this well has also been able to provide irrigation for crops during the dry season.
6年的干旱后,约旦Ziglab大坝的水位量尺显然失去了意义,该水库的建成是为了截留向西流入约旦河的水以用于灌溉。
7after six years of drought, measuring sticks are useless at the Ziglab Dam in Jordan, built to catch water flowing west into the Jordan River for irrigation.
2007年发表的一项学术研究曾表明,干旱和灌溉量的增长都会导致湖面水位降低和含盐量的增加。
A study published in 2007 concluded that both drought and increased demand for irrigation water contributed to the lake's falling water levels and rising salinity.
研究表明:该区随灌溉面积的扩大,地下水位上升迅速,灌区下游水位将超过临界埋深,从而引起土壤次生盐渍化。
The studies show the groundwater level is rising quickly and may surpass the critical depth along downstream area with the extension of the irrigating field, which can bring on the soil salinization.
这种情况也适用于使用情况从一个农场水坝提供灌溉用水的权力,因为水位,因此,在总团长,将大相径庭。
This scenario would also apply to the situation of using irrigation waters from a farm dam to provide power because the water level, and therefore the Gross Head, would vary enormously.
研究了咸水灌溉对土壤水盐动态、地下水位、地下水质、作物生长及产量的影响。
This paper studies the influence on dynamic state of soil water salt, groundwater table, groundwater quality, crop growing and yield generated by saline water irrigation.
而灌溉会使情况更糟:灌溉水来自河里或湖里盐分比雨水略多些,所以它除了增加土壤盐分外还加速了水位的上涨。
And irrigation just exacerbates things; irrigated water comes from rivers and lakes and is slightly saltier than rain, so it adds salt directly to the soil while speeding the water table's rise.
适用于地下水位较低的场所及其它扬程要求高的场合,如矿井、高楼大厦、自来水增压、山区果农灌溉用水等。
Applies to the lower groundwater levels for high head sites, and other occasions, such as mines, high-rise buildings, water booster, mountain water for irrigation and other fruit.
对于水利灌溉自动控制系统中的关键问题水渠水位即灌溉水量的控制,本文进行了深入的研究。
In this paper, we research on the water level control in depth which is the key question in the irrigation automatic control system.
印度农民钻取大约2000万口灌溉井,地下水位因之不断下降,水井也开始枯竭。
In India, where farmers have drilled some 20 million irrigation Wells, water tables are falling and the Wells are starting to go dry.
印度农民钻取大约2000万口灌溉井,地下水位因之不断下降,水井也开始枯竭。
In India, where farmers have drilled some 20 million irrigation Wells, water tables are falling and the Wells are starting to go dry.
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