1. 业奇农业网 > 技术 >

求一篇关于节约用水的英语作文

节约水资源,保护全世界

求一篇关于节约用水的英语作文

每年的节水日是3月22日,至3月28日,它的意义在于告诉人们节水的重要性。

地球的储水量是很丰富的,共有14.5亿立方千米之多。但是其中海水却占了97.2%,陆地淡水仅占2.8%,面与人类生活最密切的江河、淡水湖和浅层地下水等淡水,又仅占淡水储量的0.34%。更令人担忧的是,这数量极有限的淡水,正越来越多地受到污染。据科学界估计,全世界有半数以上的国家和地区缺乏饮用水,特别是经济欠发达的第三世界国家,目前已有70%,即17亿人喝不上清洁水,世界已有将近80%人口受到水荒的威胁。我国人均淡水为世界人均水平的四分之一,属于缺水国家。,全国已有300多个城市缺水,已有29%的人正在饮用不良水,其中已有7000万人正在饮用高氟水。每年因缺水而造成的经济损失达100多亿元,因水污染而造成的经济损失更达400多亿元。

可怕的数据表明:水资源短缺成了当今世界面临的重大危机。因此,保护和更有效合理利用水资源,是世界各国政府面临的一项紧迫任务。那么,怎样才能保护和更有效地合理利用水资源呢?从环境角度来说,最完善的措施是拦水和调水。改变水资源的时空分布。但这只是一个方面,而对于人类来说,更重要的是注重节约用水,提高水资源利用率:在工业方面提倡节水产业,控制污染物的排放,加强废水处理;在农业方面应采用先进的灌溉方式(喷灌、滴灌)等。水是生命的基础,它不仅关系到人类生活的质量,还影响到人类的生存能力。所以增强水的危机意识,珍惜水,节约水,保护水资源,才是当务之急。

为此,我们国家制定了相应的节水措施,

我国国家建设部决定每年6月份的第二周作为全国城市节约用水宣传周,目的是认真贯彻《中华人民共和国水法》和国务院关于《城市节约用水管理规定》,从而增强人们计划用水,节约用水的观念。

如何节水呢?有以下几种方法:

1、节水为荣——随时关紧水龙头

2、一水多用——充分利用每一滴水

3、阻止滴漏——检查维修水龙头

4、监护水源——保护水源就是保护生命

5、少用洗涤剂——减少水污染

6、植树造林——涵养水源

7、积极宣传——让每个人都投入到节水的“战斗”中

当然,这是远远不够的,但是这些方法是每一个人都能够做到的。

我们都希望生活在一个充满鸟语花香的世界里,而水是万物之需。所以让我们从现在开始,维护整个地球,维护整个世界。节约水资源,保护全世界!

Conservation of water resources, protection of the world

Day is an annual saving of March 22 to March 28, it is about to tell people the importance of saving water.

Earth's reservoir of water is very rich, there were as many as 1.45 billion cubic meters. But accounts for 97.2% of sea water, land accounted for only 2.8% of fresh water, surface and the closest of human life in rivers and freshwater lakes and shallow groundwater, such as fresh water, and only 0.34% of fresh water reserves. What is even more worrying is that a very limited quantity of fresh water are increasingly polluted. According to the scientific community estimates that more than half of the world's countries and regions, the lack of drinking water, especially in economically underdeveloped Third World countries, there are now 70 percent, or 17 million people not to drink clean water, the world has nearly 80 % of the population by the water

Threat. China's per capita fresh water for a quarter of the world's average, are water-scarce countries. National has more than 300 cities short of water, 29% of people are drinking bad water, which has 70 million people are drinking high fluoride water. Due to lack of water caused by the annual economic losses amounting to more than 100 billion yuan, due to water pollution caused by the economic loss of more than 400 million.

Data indicate that terrible: water shortages facing the world today has become a major crisis. Therefore, more effective protection and rational utilization of water resources, is facing the governments of the world an urgent task. So, how can we more effectively the protection and rational utilization of water resources in this? From an environmental point of view, the most complete and the measure is water diversion Water Curb. Changes in spatial and temporal distribution of water resources. But this is only one aspect, and for humans and, more importantly, pay attention to water conservation, improve the utilization of water resources: to promote water saving in the industrial sector industries, to control the emission of pollutants, strengthen waste water treatment; in agriculture should be adopted

With advanced irrigation methods (spray irrigation, drip irrigation) and so on. Water is the basis of life, it is not only related to the quality of human life, but also affect the survival of mankind. Therefore, to enhance awareness of water crisis, value of water, saving water, protection of water resources is imperative.

To this end, our country has developed the corresponding water-saving measures,

Ministry of Construction of China's decision in June of each year the second week of the city to save water as part of the national awareness week aims to seriously implement the "People's Republic of China Water Law" and the State Council on the "management of urban water conservation", in order to enhance the water plan, water conservation concept.

How do water-saving? There are several ways:

1, water-saving proud of - to keep the tap closed

2, a multi-purpose water - make full use of every drop

渠道防渗和平整土地是节约用水的基础。

通过各种渠道将灌溉水引入田间,是实现地面灌溉的一个重要环节。但在渠道输水过程中,通过渠侧、渠底的各种漏洞、裂隙所渗漏而损失掉的水量极为严重。如上文所述,有50%~80%的灌溉水在引入田间之前就渗漏损失掉了。

渠道防渗技术就是防止灌溉水在渠道渗漏损失所采取的措施,包括管理措施和工程措施。工程措施主要是采用砌石、混凝土、沥青、塑料薄膜等防渗材料,修建渠道防渗层及其保护层等,是防止渠道渗漏最根本的技术措施。按其特点可以分为三大类,即:在渠床上加做防渗层(衬砌护面),改变渠系土壤的渗漏性能和新酌防渗渠槽结构形式。

平整土地是保证灌水质量,提高灌水劳动生产率,节约灌溉用水的一项重要措施。平整土地涉及到山、水、田、林、路、渠、井、村等各个方面的安排,必须适应农田基本建设规划的要求。畦灌要求的地面坡度以0.001~0.003为宜,最大不宜超过0.01;沟灌要求地面坡度以0.003~0.008为宜,最大不宜超过0.02。田块内的横方向,一般要水平没有坡度。平整土地时应尽量保留表土,通常挖方处应保留表土厚度20~30厘米。

在美国,低压管道灌溉技术被认为是节水最有效、投资最节省的一种灌水技术。在加利福尼亚的图尔洛克灌区,早在20世纪20年代就开始用混凝土管道代替明渠输水。自20世纪60年代开始广泛推广管道化输水,现在美国近一半大型灌区已实现了管道化。

节水灌溉制度是指在一定的气候、土壤和农业技术条件下,为了促进农作物获得高产、稳产及节约用水而制订的适时、适量灌水的具体方案。其内容包括农作物生长期内(含播种前)的灌水次数、灌水时间、灌水定额和灌溉定额。制订节水灌溉制度的核心问题,是确定总灌水量及其在作物生育期时程上的合理分配,以充分发挥水对作物生长环境的调节作用,收到增产、节水、节能的综合经济效益,为农业生产保驾护航。

美国在重视改善灌溉节水技术的同时也非常重视改善灌溉管理,在这方面,一是对灌溉系统进行全面改进;二是从土壤一植物一大气的特性及相互关系的原理着手提高灌溉水效率,改善作物供水状况,促进节能节水;三是帮助用水户制订水管理和节水计划,提供制订灌水方案的技术,并向管理区提供操作技术方面的帮助。

根据我国北方地区的经验,节水灌溉制度的关键是,抓作物需水临界期灌水,减少灌水次数;适当降低土壤适宜含水量的下限,减少灌溉定额。例如,在黄淮海平原和关中地区,小麦、玉米一年两作,茬口衔接很紧,为兼顾前后茬,节水节能,在小麦收割前10天左右浇一次麦黄水,定额为每公顷600立方米,既可提高小麦抗旱能力,减轻干热风的危害,又有利于夏玉米及时播种,促进快长、早发,一水两用。

本文由用户上传,如有侵权请联系删除!转转请注明出处:https://nongye.s666.cn/js/5_6571018912.html