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农牧部门30套智能田口精准测流设备助力秋浇节水

2023-11-09 10:50:56 来源:内蒙古巴彦淖尔农牧 阅读量:18445 评论

导读:据统计,巴彦淖尔市计划秋浇面积为500万亩左右,耗水量控制在10亿方以内,亩均用水定额控制在120-200方,比往年缩减一半左右。

  【农机网 地方农机】为全面贯彻习近平总书记在巴彦淖尔考察时关于“河套灌区要节约水资源”的重要指示精神,深入推进河套灌区节水控水工作顺利完成,内蒙古巴彦淖尔市农发中心整合项目资金,购置智能田口精准测流设备30套,精准测定秋浇用水量。设备主要用于引黄灌区,分别在临河区安装8台(狼山镇2台、城关镇6台),五原县安装15台(和胜乡8台、银定图镇4台、塔尔湖镇3台),杭锦后旗安装7台(二道桥镇5台、市农科所园子渠实验基地2台)。
 
  该测流设备由闸门开关、超声波渠道测流箱与太阳能电路板组成,集精确的流量计算、数据采集、无线通信功能于一体,利用超声波时差法原理,通过对瞬时流量和总流量的测定,提供精确的用水记录。
 
  其优点有:一是采用流速面积法,无需刻意改变水的流态,水头损失更小;二是采用时差法超声波技术,每对换能器测量的是该层水流的平均流速,超声波信号从测水箱的一侧发射到另外一侧接收,其时间差代表的是该层水流的平均流速,更能从整体上反应水流的状态,多层交叉排布的换能器,将过流断面切割成多层,获得多层的平均流速,又可抵减渠道中因紊流造成的计量不确定度,大大提高了渠道断面平均流速数据的稳定性和准确度;三是具备过流断面淤积高度检测功能,并在流量计算时,抵减淤积造成的断面面积,使得最终流量数据更逼近真值;四是采用多声道测量技术,大幅度增加超声波探头的数量,每5-10厘米排布一层,分别测量断面各层的流速,因此不同的坡降、不同复杂外部条件下均可以实现精确计量;五是依据流量计规范进行校验,内嵌多流态算法模型,无需现场校准,彻底解决了过去现场校准时真值获取困难问题。
 
  今年,我市建立一关一放灌溉制度,推行“一把锹”浇地模式,全面落实浅浇快轮,逐步压减秋浇用水量。据统计,全市计划秋浇面积为500万亩左右,耗水量控制在10亿方以内,亩均用水定额控制在120-200方,比往年缩减一半左右。因此秋浇水量测定的精准与否决定着全市秋浇节水任务的落实。精准测流箱不仅很好的解决了这个问题,而且可用于来年春灌及生育期用水量的测定,对农业用水精准调控工作有着积极作用。
 
  通过安装应用精准测流箱与平地缩块措施相结合,为今年秋浇定额工作提供了理论依据,为全市秋浇工作的顺利进行提供了保障。下一步,将继续推广精准测流设备,更加精细调配农业用水,为提高全市水资源利用效力,推动农业节本增效奠定基础。
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