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11.
Assessment of spatial variability in some soil properties as related to soil salinity and alkalinity in Bafra plain in northern Turkey 总被引:4,自引:0,他引:4
Cemek B Güler M Kiliç K Demir Y Arslan H 《Environmental monitoring and assessment》2007,124(1-3):223-234
The objectives of this study were to assess the variability in soil properties affecting salinity and alkalinity, and to analyze
spatial distribution patterns of salinity (EC) and alkalinity (ESP) in the plain, which was used irrigation agriculture with
low quality waters. Soil samples were collected from 0–30cm, 30–60cm, 60–90cm and 90–120cm soil depths at 60 sampling sites.
Soil pH had the minimum variability, and hydraulic conductivity (Ks) had the maximum variability at all depths. The mean values
of pH, EC, ESP and Ks increased while the mean values of CEC decreased with soil depth. Values pH, EC and ESP were generally
high in the east and northeastern sides. Soil properties indicated moderate to strong spatial dependence. ESP and pH were
moderately spatially dependent for three of the four depths, EC exhibited moderate spatial dependence for one of the four
depths, CEC had a moderate spatial dependence at all depths, and Ks exhibited a strong spatial dependence. EC, CEC, and ESP
were considerably variable in small distances. The spatial variability in small distances of EC, CEC, pH and ESP generally
increased with depth. All geostatistical range values were greater than 1230m. It was inferred that the strong spatial dependency
of soil properties would be resulted in extrinsic factors such as ground water level, drainage, irrigation systems and microtopography. 相似文献
12.
为确保高校社区安全管理的精准、高效、便捷,将社区网格化管理的理论和技术引入高校安全管理中,构建“防灾型”高校社区安全管理模式,结合“微安全”微信平台,链接社区全体人员。根据布拉德安全曲线,将“防灾型”高校社区安全管理模式定位在杜邦安全管理第三阶段;采用问卷调查的形式对管理效果进行考察。研究结果表明:事故发生率降低61.42%,事件处理效率提高74.05%,居民满意度达80.2%;“防灾型”网格社区安全管理模式能够对高校安全信息进行系统化管理,实现管理层与执行层的扁平化、联动管理;安全事故伤害率越来越低。 相似文献
13.
王克难 《防灾科技学院学报》2003,5(3):29-33
本文对WindowsAPI函数在VisualBasic中的使用方法进行了简明的论述 ,使用户能够轻松自如地访问操作系统以及声音设备等。 相似文献
14.
Yıldırım Seda Yıldırım Durmuş Çağrı Aydın Kenan Erdoğan Fatma 《Environmental science and pollution research international》2021,28(39):54766-54780
Environmental Science and Pollution Research - This study aims to test the effects of the number of tourist arrivals and tourism receipts on carbon emissions for the Mediterranean countries. The... 相似文献