Spatial occurrence and hydrological significance of Andean permafrost (Agua Negra, San Juan, Argentina) (HyPerm)

安第斯永久冻土的空间发生和水文意义（阿瓜内格拉，圣胡安，阿根廷）（HyPerm）

• 批准号: 461744503
• 负责人: Professor Dr. Lothar Schrott
• 金额: --
• 依托单位: Geographisches Institut
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/461744503?language=en
• 关键词: Spatial; occurrence; hydrological; significance; Andean

The semiarid Andean cryosphere is an important hydrological reservoir that controls runoff and groundwater recharge through glacier melt, precipitation, snowmelt (including perennial snowfields), and water releases from the active layer in the extensive permafrost regions. However, in numerous studies on mountain systems and processes the hydrological influence of permafrost is still insufficiently represented. Thus, the main objective of this project is to study the spatial distribution, geomorphic characteristics and hydrological significance of Andean mountain permafrost in blockslopes, and taluses (including protalus ramparts). Findings from our previous DFG project (PermArg) on rock glaciers will be integrated and extended through mapping, statistical modelling, soil temperature monitoring, and geophysical surveys (incl. four-phase modelling) on so far overlooked blockslopes and taluses. Furthermore, we will continuously measure the discharge at six gauging stations for hydrograph separations (incl. water sampling for further hydrochemical analysis and mixing models; see work programme of complementary project “Source, dynamics and hydrological significance of water reservoirs of a High Andean Permafrost Environment”/HyRes). We hypothesize that a significant part of the (seasonally) thawing active layer of these periglacial landforms (taluses, blockslopes, rock glaciers) contributes to the overall discharge and groundwater recharge. Our findings will significantly improve our knowledge regarding the occurrence and hydrological importance of permafrost in the semiarid Andes.

半干旱的安第斯冰冻圈是一个重要的水文水库，它通过冰川融化、降水、融雪（包括常年雪原）和广泛的永久冻土区活动层的水释放来控制径流和地下水补给。然而，在许多关于山区系统和过程的研究中，多年冻土的水文影响仍然没有得到充分的体现。因此，该项目的主要目标是研究安第斯山脉断坡和坡积岩（包括坡积岩）中的永久冻土的空间分布、地貌特征和水文意义。我们以前的DFG项目（PermArg）对岩石冰川的研究结果将通过绘图，统计建模，土壤温度监测和地球物理调查（包括）进行整合和扩展。四阶段建模），到目前为止被忽视的块斜坡和taluses。此外，我们将在六个水文站连续测量流量，以进行水文分离（包括水取样，用于进一步的水化学分析和混合模型;见补充项目“安第斯高原永久冻土环境水库的水源、动力学和水文意义”/HyRes的工作方案）。我们假设，这些冰缘地貌（taluses，blockslopes，岩石冰川）的（季节性）解冻活跃层的一个重要组成部分，有助于整体排放和地下水补给。我们的研究结果将显着提高我们的知识在半干旱的安第斯山脉永久冻土的发生和水文的重要性。