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随着边坡工程项目的增多,边坡工程事故也时有发生。对存在安全隐患或影响正常使用的既有边坡工程急需进行检测鉴定、加固治理。通过对贵州省某烤烟中转仓库边坡工程进行全面检测,得出了准确的检测鉴定结论。在实践的基础上形成了一套既有软质岩事故边坡工程的检测鉴定体系,提出软质岩边坡工程需重点考虑岩土体自身特性对边坡稳定性的影响,研制了锚杆拉拔试验用的一种张拉端夹片式锚具。更多还原 相似文献
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在蒸渗仪控制条件下就旺长期烤烟叶片细胞液质量分数的影响因子进行相关研究。结果表明:施氮量的增加对旺长期烤烟叶片蒸腾作用和光合作用的促进作用远大于对烤烟吸收水分的促进作用,在一定程度上提高了烤烟叶片细胞液质量分数;旺长期烤烟叶片细胞液质量分数随施氮量增加而增加,总施氮量超过67.5 kg/hm2时旺长期烤烟叶片细胞液质量分数减小;旺长期烤烟叶片细胞液质量分数与0~20 cm以及20~40 cm土层土壤含水率呈现负相关关系,与烟株水分蒸腾速率及烟株光合速率的负相关达到显著水平。 相似文献
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我国是世界人口最多的国家,一直很注重农业的可持续发展。依据贵州省地理位置独特、多山区的喀斯特地貌特征,结合贵州省的农业用水情况,特别是贵州省水资源分布严重不均,水资源利用率低,农业用水紧张其浪费严重的特点,分析了在贵州省发展节水灌溉技术的必要性。同时,还基于节水灌溉技术特点和贵州省的独特地貌,指出贵州省发展节水灌溉技术的潜力巨大、经济实用效益可观,是实现贵州省农业可持续发展的重要途径。 相似文献
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烤烟滴灌技术把灌溉水在输水过程中以及田间渗漏及蒸发损失减少到最低限度,变水浇地为水浇烟.烤烟滴灌科技含高量,平均单产3678.15 kg/hm2,均价10.15元/kg,平均每公顷投入9 273元,纯收入28060.2元/hm2.烤烟滴灌节水、增产、增效、省工. 相似文献
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农业面源污染对贵州省水库影响的初步分析 总被引:2,自引:0,他引:2
贵州省是一个多水库的省份之一,水库的水质直接影响着贵州省饮用水的水质状况。目前,贵州省许多河流受到污染,影响了水库的水体状况,部分地区成为"水质型缺水"地区。调查资料显示,农业面源污染成为贵州省水库主要污染源之一。本文通过分析贵州省部分水库水体的污染成因,提出防治污染的具体措施。 相似文献
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Water requirement pattern for tobacco and its response to water deficit in Guizhou Province 总被引:1,自引:0,他引:1
《水科学与水工程》2015,8(2):96-101
The water requirement pattern for tobacco(Yun 85) was identified based on analysis of data obtained from pot experiments in a canopy at the Xiuwen Irrigation Test Central Station in Guizhou Province, China. The results showed that the tobacco water requirement and the tobacco water requirement intensity throughout the growth period in pot experiments were significantly lower than those in field production. In pot experiments, the tobacco water requirement throughout the growth period ranged from 159.00 to 278.90 mm, with a reduction in the range of241e441 mm, as compared with that in field production. Also, the average water requirement intensity at the vigorous growing stage was1.97 mm/d, and the water requirement and water requirement module were 33.80e72.60 mm and 16.39%e33.09%, respectively, at the group stage, almost equal to their values at the vigorous growing stage. The patterns of the tobacco water requirement and water requirement module in pot experiments were different from those in field production. In pot experiments, the tobacco water requirement and water requirement module ranked the highest at the mature stage, followed by those at the group/vigorous growing and rejuvenation stages, while the water requirement intensity ranked the highest at the vigorous growing stage, followed by those at the mature, group, and rejuvenation stages. The pattern of the water requirement intensity in pot experiments was consistent with that in field production. In addition, the response of the tobacco water requirement to water deficit was also analyzed. Serious water deficit at the vigorous growing stage and continuous water stress at the group,vigorous growing, and mature stages can greatly influence the tobacco water requirement. Water deficit led to reductions in the water requirement and water requirement intensity at each growth stage. The vigorous growing stage exhibited the highest sensitivity to water deficit.The lower limit of moderate soil water stress at the vigorous growing stage was 65% of the field capacity. Results of this study can help to establish a reasonable irrigation schedule for tobacco production in Guizhou Province, China. 相似文献
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贵州省位于我国西南喀斯特地区的中心,地貌类型以山地为主,河谷深切,水资源开发利用难度大,提高水资源利用效率对于贵州省的可持续发展具有重要意义。基于水资源利用、社会经济、生态环境等3个一级指标构建水资源评价指标体系。在此基础上,以次级指标为松弛变量,利用超效率DEA模型(SE-DEA)计算一级指标超效率值;采用区间层次分析法(IAHP)计算一级指标权重向量。基于SE-DEA和IAHP方法建立水资源综合评价模型SE-DEA-IAHP,得出水资源利用总效率值。结果表明:贵州省水资源利用效率值较低,2015-2019年总效率值在1附近动态变化;从一级指标来看,社会经济指标的IAHP权重值最大,但水资源转换效率并不高,说明贵州省经济的高速发展也带来了一定程度的水资源浪费;考虑到贵州省特殊的岩溶地质条件,增加相应的经济管理投入、优化产业水量配置结构和提高用水技术手段是贵州省水资源可持续发展的关键。 相似文献
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In order to identify the principal factors influencing soil water characteristics (SWC) and evaluate SWC effectively, the multivariate-statistical canonical correlation analysis (CCA) method was used to study and analyze the correlation between SWC and soil physical and chemical properties. Twenty-two soil samples were taken from 11 main tobacco-growing areas in Guizhou Province in China and the soil water characteristic curves (SWCC) and basic physical and chemical properties of the soil samples were determined. The results show that: (1) The soil bulk density, soil total porosity and soil capillary porosity have significant effects on SWC of tobacco fiels. Bulk density and total porosity are positively correlated with soil water retention characteristics (SWRC), and soil capillary porosity is positively correlated with soil water supply characteristics (SWSC). (2) Soil samples from different soil layers at the same soil sampling point show similarity or consistency in SWC. Inadequate soil water supply capability and imbalance between SWRC and SWSC are problems of tobacco soil. (3) The SWC of loamy clay are generally superior to those of silty clay loam. 相似文献
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为深入探究贵州省干旱事件发展规律及区域重现期特征,采用贵州省1960—2017年逐月气象资料计算标准化降水蒸散指数(SPEI),采用三阈值法游程理论、小波理论、Copula函数等方法对干旱时空演变特征、周期特征以及区域重现期特征进行分析。结果表明:1960—2017年贵州省干旱整体上呈严重化趋势,各分区存在差异,其中黔西南地区的干旱化趋势最为明显,SPEI线性倾向率为-0.003/10a;干旱强度由高到底的分区排序依次为黔东、黔北、黔西南、黔中、黔西北、黔南,且黔中地区的干旱发生频率最高;贵州省四季干旱的主周期分别为18、15、30和8 a,空间上南北分布差异显著,周期较长的区域范围呈现先增加后减少的趋势;贵州省黔北地区的干旱重现期最小,表明此区域发生极端干旱事件的概率较大,遭受干旱灾害的可能性较大。研究结果可为贵州省水资源管理及干旱风险防治提供科学依据。 相似文献
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通过评价贵州省山区现代水利试点项目的实施效益及成果,进一步探索贵州省农业水利发展新路径。采用层次分析法、静态评价法及SPSS、MATLAB等软件计算分析贵州省26个山区现代水利建设试点项目的效益。结果表明:24个项目实施达到良好状态,2个实现优秀,试点项目在节水、灌溉、增产增收、生态等方面效益显著;项目实施后统计年度产值约1.5亿,带动发展贫困户共计8 326户,影响辐射农户数约10 000户,项目覆盖区群众每年人人均增收约3 000元以上;有效解决高效节水灌溉面积4 686.67 hm2,灌溉保证率达到98%以上。贵州省山区现代水利建设试点项目是成功的,各个试点项目区可作为水生态文明与水利工程同步建成的典型。 相似文献
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在阐述传统护坡和新型生态护坡模式类型及特点的基础上,探讨了各种护坡形式在贵州省水利工程中的运用,对比分析了新型生态护坡的优势,展望了贵州省水利工程边坡防护技术的发展方向,旨在为贵州省其他水利工程设计提供一定的参考。 相似文献
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在国家的统一部署下,以1977~1980年全国第三次水力资源普查成果为基础,根据最新的地形、水文资料复核得出贵州省河流水力资源的理论蕴藏量为18086.4MW;根据20世纪80年代以来各勘测单位完成的规划设计成果和目前的建设情况,分别统计出贵州省水力资源技术可开发量为19487.9MW和已建、正建电站的开发量为10189.8MW;并按照全国统一的标准和计算方法,评价与确定出贵州省水力资源经济可开发量为18980.65MW。文章还对贵州省今后水力资源的开发、前期工作安排,以及电源建设的布局及电力市场的管理等进行了评价和建议。 相似文献