...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Estimation of temporal variation in splash detachment in two Japanese cypress plantations of contrasting age
【24h】

Estimation of temporal variation in splash detachment in two Japanese cypress plantations of contrasting age

机译：两种年龄不同的日本柏树人工林飞溅物随时间变化的估算

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To elucidate splash erosion processes under natural rainfall conditions, temporal variations in splash detachment were observed using a piezoelectric saltation sensor (H11B; Sensit Co., Portland, ND, USA). Preliminary laboratory tests of Sensit suggested that they were suitable for field observations. Field observations were conducted between July and September 2006 in 21- and 36-year-old Japanese cypress (Chamaecyparis obtusa) plantations with mean stand heights of 9·2 m and 17·4 m, respectively. Splash detachment (in g m~(-2)) was measured seven times using splash cups, and raindrop kinetic energy (in J m~(-2) mm~(-1)) in both stands was measured using laser drop-sizing (LD) gauges. Sensit was installed to record saltation counts, which were converted to temporal data of splash detachment (splash rate; in g m~(-2) 10 min~(-1)) using the relationship between splash detachment and saltation counts. Surface runoff was monitored using runoff plots of 0·5 m width and 2·0 m length to obtain temporal data of flow depth (in millimeters). Both total splash detachment and raindrop kinetic energy were larger in the older stand. Increased splash rates per unit throughfall were found in both stands after rainless durations longer than approximately one day in both stands. However, a lower splash rate was found in the 21-year stand after rainfall events. During extreme rainstorms, the 21-year stand showed a low runoff rate and a decline in the splash rate, while the 36-year stand showed a higher splash rate and increased flow depth. The piezoelectric sensor proved to be a useful means to elucidate splash erosion processes in field conditions.
机译：为了阐明自然降雨条件下的飞溅侵蚀过程，使用压电盐传感器（H11B; Sensit Co.，波特兰，北达科他州，美国）观察到飞溅脱离的时间变化。 Sensit的初步实验室测试表明它们适合现场观察。在2006年7月至2006年9月之间，对21岁和36岁的日本柏（Chamaecyparis obtusa）人工林进行了实地观察，这些人工林的平均林分高度分别为9·2 m和17·4 m。使用飞溅杯测量飞溅分离度（以gm〜（-2）为单位）七次，并使用激光滴定尺寸（以mm〜（-2）mm〜（-1）为单位）测量两个支架的雨滴动能（以J m〜（-2）mm〜（-1）为单位）。 LD）量规。安装了Sensit来记录盐分计数，并使用飞溅分离和盐分计数之间的关系将盐分计数转换为飞溅物的时间数据（飞溅率;单位为g m〜（-2）10 min〜（-1））。使用0·5 m宽度和2·0 m长度的径流图监测地表径流，以获得流动深度的时间数据（以毫米为单位）。在较老的林分中，总飞溅物脱落和雨滴动能都较大。在两个雨棚的无雨时间超过大约一天后，两个雨棚的单位穿透水飞溅率均增加。但是，在降雨事件发生后的21年展位中发现了较低的飞溅率。在极端暴雨期间，21年展位表现出较低的径流率和飞溅率下降，而36年展位表现出较高的飞溅率和增加的流量深度。压电传感器被证明是阐明现场条件下飞溅腐蚀过程的有用手段。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号