Spatial and temporal dynamics of soil moisture after rainfall events along a slope in Regosols of southwest China
文献类型：期刊论文
| 作者 | Liu, Gangcai ; Zhang, Jianhui
|
| 刊名 | HYDROLOGICAL PROCESSES
 |
| 出版日期 | 2007-09-30 |
| 卷号 | 21期号:20页码:2778-2784 |
| 关键词 | soil moisture dynamics soil moisture content sloped land |
| ISSN号 | 0885-6087 |
| 通讯作者 | Gangcai Liu（刘刚才） |
| 合作状况 | 其它 |
| 英文摘要 | High frequency seasonal drought in purple soils (Regosols in FAO taxonomy) of the hilly upland areas of Sichuan basin, China. is one of the key restrictive factors for crop production. In order to manage irrigation and fertilizer application in these soils effectively. the soil water content in a sloped plot with 60 cm soil depth was measured by neutron probe devices to investigate the soil moisture regime during the 1998 rainy season after various amounts of rainfall events. The results showed that variation of soil moisture along the slope positions was highest in the top soil layer during the period of sporadic rainfall that did not induce any runoff. The coefficients of variation of soil moisture at various slope positions (upper, middle, and lower) are 17-36%. 8.95% 10.25%. 8.58% 8.05% and 9.21% at the 10 cm, 20 cm, 30 cm, 40 cm, 50 cm and 60 cm soil depths respectively. When surface runoff occurred, the soil moisture dynamics at various positions on the plot were then very different. Soil water content decreased more rapidly on the upper slope than on the middle and lower slope positions. When both surface runoff and throughflow occurred, the soil moisture dynamics in the various layers showed a stable period (soil water content is near constant as time elapses) that lasted about I week. Also, the pattern of moisture dynamics is 'decreasing-stabilization-decreasing'. Thus, irrigation and fertilization management according to the spatial and temporal features of soil moisture dynamics on sloped land can increase the water and fertilizer utilization efficacy by reducing their losses during the stable period. Copyright (c) 2006 John Wiley & Sons, Ltd. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Water Resources |
| 研究领域[WOS] | Water Resources |
| 关键词[WOS] | WATER ; FIELD ; SIMULATION ; RUNOFF |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000250215800009 |
| 公开日期 | 2010-11-08 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/2450]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 作者单位 | Chinese Acad Sci, Inst Mt Hazard & Environm, Water Res Minist, Chengdu 610041, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Gangcai,Zhang, Jianhui. Spatial and temporal dynamics of soil moisture after rainfall events along a slope in Regosols of southwest China[J]. HYDROLOGICAL PROCESSES,2007,21(20):2778-2784. |
| APA | Liu, Gangcai,&Zhang, Jianhui.(2007).Spatial and temporal dynamics of soil moisture after rainfall events along a slope in Regosols of southwest China.HYDROLOGICAL PROCESSES,21(20),2778-2784. |
| MLA | Liu, Gangcai,et al."Spatial and temporal dynamics of soil moisture after rainfall events along a slope in Regosols of southwest China".HYDROLOGICAL PROCESSES 21.20(2007):2778-2784. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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