Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 41501079 |
| 黄河源区典型冻土退化方式对水文过程影响的时空差异及敏感预估 | |
| 曹伟 | |
| 主持机构 | 中国科学院寒区旱区环境与工程研究所 |
| 开始日期 | 2016 |
| 结束日期 | 2018 |
| 资助经费 | 240000(CNY) |
| 项目类别 | 青年科学基金项目 |
| 资助机构 | CN-NSFC（国家自然科学基金） |
| 语种 | 中文 |
| 国家 | 中国 |
| 英文简介 | Permafrost degradation and its freezing-thawing process affect the physical, chemical and biological process of ecological and hydrological system in cold regions. Especially, frozen-soil water movement is the important carrier or main form of migration-transformation of matter and energy among each surface-layer of cold regions. So the frozen-soil water movement is one of the main driving forces to water-resources deterioration and ecological-function degradation. Due to the complexity of frozen-soil type in Qinghai-Tibet Plateau, different permafrost-degradation ways differently affect the hydrological-geological conditions and hydrological processes. In order to further reveal the multiple and difference mechanism between the hydrological processes, two field permafrost-hole profiles located in one sunny slope and one shady slope are investigated in the source region of Yellow River. Firstly, the investigated permafrost is divided into 3 kinds of the hillside, gentle-slope and flat-ground based on the terrain feature. Meanwhile, the permafrost-degradation process is classified into 3 stages of initial-rising, thawing-sandwich and end-disappearing. We study on the differentiation regularities of hydrologic process under different frozen-soil types and the variation characteristics hydrologic process under typical permafrost degradation stages. Then, the study simulates the differences and sensitivities of hydrologic process in typical stages of permafrost degradation under different frozen-soil types by using permafrost hydrology-process model. Moreover, the space-time mechanism is superimposed to different hydro-geological unit from point to surface. It will estimate the macroscopically impact on water resources changes due to the permafrost degradation in the whole source region of Yellow River. This study will completely reveal the mechanism of hydrologic process to permafrost degradation from two angles of space-time. The results provide important parameters and theoretical basis for establishing regional permafrost-hydrology model and its accurate simulations. |
| 中文关键词 | 黄河源区 ; 冻土退化方式 ; 水文过程影响 ; 时空差异 ; 敏感预估 |
| 来源机构 | 中国科学院西北生态环境资源研究院 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/346927 |
| 推荐引用方式 GB/T 7714 | 曹伟.黄河源区典型冻土退化方式对水文过程影响的时空差异及敏感预估.2016. |
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