• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Runoff features of pasture and crop slopes at different rainfall intensities, antecedent moisture contents and gradients on the Chinese Loess Plateau: a solution of rainfall simulation experiments.
【24h】

Runoff features of pasture and crop slopes at different rainfall intensities, antecedent moisture contents and gradients on the Chinese Loess Plateau: a solution of rainfall simulation experiments.

机译：黄土高原地区不同降雨强度，牧草坡度的径流特征，前期水分含量和梯度：降雨模拟实验的一种解决方案。

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

Pastures are important components of artificial vegetations for controlling soil erosion on the hilly region of Loess Plateau of China. However, runoff features of pastures and the differences with crops are not fully understood in this region. This study focused on two widely-planted pastures including ryegrass (Lolium perenne L) and alfalfa (Medicago sativa L) and one common crop spring wheat (Triticum aestivum L), and investigated their runoff features at soil boxes under different rainfall intensities, antecedent moisture contents and slope gradients through rainfall simulation experiments. And bare ground was set as control. The results indicated that the presence of vegetation delayed time to runoff and reduced runoff coefficient. The average values of time to runoff were ranked as: ryegrass > spring wheat > alfalfa > bare slope. Contrarily, the rank for slope runoff coefficient was: ryegrass < spring wheat < alfalfa < bare ground. Time to runoff and runoff coefficient showed significant (P<0.05) correlations with rainfall intensity, antecedent moisture content, and slope gradient. Time to runoff showed a negative and exponential relationship with rainfall intensity and antecedent moisture content and a negative and linear relationship with gradient. Runoff coefficient indicated a positive and linear relationship with rainfall intensity and antecedent moisture content and a positive and power-function relationship with gradient. The results presented here could provide insights into understanding the effects of rainfall intensity, slope gradient, and antecedent moisture content on surface runoff for the Loess Plateau region.
机译：草地是控制黄土高原丘陵区土壤侵蚀的人工植被的重要组成部分。但是，该地区尚未充分了解牧场的径流特征以及与农作物的差异。这项研究的重点是两个广泛种植的牧场，包括黑麦草（Lolium perenne L）和苜蓿（Medicago sativa L）和一种普通农作物春小麦（Triticum aestivum L），并研究了它们在不同降雨强度，前期湿度下在土壤箱中的径流特征。通过降雨模拟实验确定土壤的含量和坡度。并设置了裸露的地面作为控制。结果表明，植被的存在延缓了径流时间，降低了径流系数。径流时间的平均值排序为：黑麦草>春小麦>苜蓿>裸坡。相反，坡度径流系数的等级为：黑麦草<春小麦<苜蓿<裸地。径流时间和径流系数与降雨强度，前期含水量和坡度具有显着的相关性（P <0.05）。径流时间与降雨强度和前期含水量呈负相关关系，呈指数关系，与坡度呈负相关关系。径流系数与降雨强度和前期含水量呈正线性关系，与梯度呈正相关和幂函数关系。本文介绍的结果可为了解降雨强度，坡度梯度和前期水分含量对黄土高原地区地表径流的影响提供参考。

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