Significant role of permafrost in regional hydrology of the Upper Indus Basin, India

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 919, P. 170863 - 170863

Published: Feb. 8, 2024

Language: Английский

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Mechanisms of Suprapermafrost Groundwater Recharge Streamflow in Alpine Permafrost Regions: Insights From Young Water Fraction Analysis

Water Resources Research, Journal Year: 2024, Volume and Issue: 60(7)

Published: July 1, 2024

Abstract This study investigates the temporal processes of suprapermafrost groundwater (SPG)‐supplied streamflow in alpine permafrost regions, aiming to fill gap understanding this process from a water‐age perspective. Precipitation, streamflow, and SPG samples were collected Three‐Rivers Headwaters Region (TRHR). We defined physical meaning F yw (the young water fraction) calculated it for first time. The results showed that TRHR, mean travel time (MTT) was 159 days, approximately 46.4% younger than 77 whereas MTT 342 12.2% 97 days. correlation analysis revealed various climatic factors played dominant roles recharge variations SPG‐supplied within TRHR. rate did not significantly affect ; however, thickness active layer ultimately controlled transit distribution. Regression further demonstrated nonlinear impact precipitation, average temperature, freezing days on , which is closely related seasonal freeze–thaw heat conduction advection layer. During initial ablation period, primarily recharged by SPG, resulting short‐tail Our findings provide valuable insights into runoff generation concentration regions have important implications resource management.

Language: Английский

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Variations of stable isotopic characteristics of shallow lake-river water system and its indicative significance in Lake Poyang wetland, China

Journal of Lake Sciences, Journal Year: 2024, Volume and Issue: 36(2), P. 487 - 498

Published: Jan. 1, 2024

为深入认识鄱阳湖湿地区域水循环过程,于2019年1-12月在鄱阳湖国家级自然保护区对降水、河流水、主要碟形湖水进行系统采集,综合分析碟形湖-河流水稳定同位素的动态变化特征及其指示意义。结果表明,鄱阳湖湿地修河和赣江的同位素组成具有明显的季节性变化规律,4月河水同位素最为富集,5-7月逐渐贫化,之后呈现出不断富集的变化趋势,整体上与降水同位素的时间变化特性相似。在空间分布上,各段河水的同位素组成均具有相对稳定的沿程分布特征,赣江在修河汇入点上、下游的同位素特性在大多数月份没有呈现出明显变化。碟形湖水同位素的年内变化范围比河水大,并且相对富集。主要碟形湖水的δ²H-δ¹⁸O关系接近当地大气降水线,具有更小的蒸发线斜率以及系统性偏离的特征,反映碟形湖主要受到当地降水补给,经历了一定程度的蒸发作用。基于指数模型方法估算修河和赣江水体的平均滞留时间(mean residence time,MRT)分别为1.54和0.81年,赣江较短的MRT表明鄱阳湖流域具有不同水体组分相互快速转化的水力条件,修河上游柘林水库的调蓄作用导致其MRT明显大于赣江。通过假定碟形湖水的蒸发过程遵循瑞利分馏模型,全年的同位素监测结果揭示蚌湖、沙湖、大湖池的年平均蒸发损失量分别为15.5%、15.0%、14.1%,不同碟形湖之间蒸发程度的差异可能与地形、植被和水动力条件等因素的综合影响有关。;Lake Poyang is the largest freshwater lake in China and an important wetland ecosystem with international protection significance. Affected by climate change anthropogenic activities, hydrological rhythm of Lake has changed significantly, which seriously threatens function stability ecosystem. Shallow lakes rivers are main natural units wetland, store abundant environmental information directly affect biogeochemical processes wetlands. In order to further understand regional process, a systematic collection precipitation, river water shallow National Nature Reserve was carried out from January December 2019, stable isotopes lake-river system were comprehensively analysed for their dynamic characteristics indicative Results showed that isotopic composition Xiuhe River Ganjiang had obvious seasonal variations, most enriched April, gradually depleted May July, then trend continuous enrichment, similar temporal variation precipitation isotopes. Spatially, each section relatively distribution along distance. The lower did not show significant changes months after inflow River, possibly related large discharge difference between River. annual range larger than more enriched. δ²H-δ¹⁸O relationships close local meteoric line, smaller evaporation line slopes deviation, indicating mainly recharged experienced certain degree evaporation. mean time (MRT) 1.54 years 0.81 respectively based on exponential flow model. shorter MRT indicates basin hydraulic condition conducive rapid exchange different components, obviously due regulation storage Zhelin Reservoir upstream. Based assumption process followed Rayleigh fractionation model, monitoring revealed average loss Banghu, Shahu Dahuchi 15.5%, 15.0% 14.1%, respectively. among could be associated comprehensive influence terrain, vegetation hydrodynamic conditions.

Language: Английский

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First comprehensive stable isotope dataset of diverse water units in a permafrost-dominated catchment on the Qinghai–Xizang Plateau

Published: March 21, 2024

Abstract. Considered as the Asian water tower, Qinghai–Xizang Plateau (QXP) processes substantial permafrost, where its hydrological environments are spatially differed and can be easily disturbed by changing permafrost melting ground ice. Permafrost degradation compels to become an important source of surface runoff, changes storage groundwater, greatly influences in regions. However, evidences linking on QXP lacking, which increase uncertainties evaluation results resources. Stable isotopes offer valuable information connections between (ground ice) components. It is therefore particularly observe stable different waterbodies, vary over hourly annual timescales truly capture thawing signals reflect influence regional processes. The Beiluhe Basin (BLH) hinterland were selected, well integrates all components related cycles, ideal site study effect change. This paper presents temporal data (δ18O, δD, d-excess) bodies (precipitation, stream water, thermokarst lake, groundwater) BLH produced 2017 2022. In special, first detailed isotope ice at 17 boreholes 2 thaw slumps presented. A description sampling processes, sample pretreating isotopic quality control given. firstly described full seasonal amplitude precipitation, stream, lakes, delineated depth variability Totally, 554 precipitation samples, 2402 lakes/ponds 675 102 supra-permafrost 19 sub-permafrost samples collected during six years’ continuous work. Importantly, 359 depths from profiles collected. set provides a new basis for understanding effects QXP. also supports cryospheric Northern Hemisphere.

Language: Английский

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Small-scale hydrological patterns in a Siberian permafrost ecosystem affected by drainage

Biogeosciences, Journal Year: 2024, Volume and Issue: 21(10), P. 2571 - 2597

Published: May 28, 2024

Abstract. Climate warming and associated accelerated permafrost thaw in the Arctic lead to a shift landscape patterns, hydrologic conditions, release of carbon. In this context, lateral transport carbon shifts therein following remain poorly understood. Crucial factors affecting distribution include depth saturated zone above table with respect changes water connectivity water-saturated zones. Landscape conditions are expected change future due rising temperatures polygonal or flat floodplain tundra areas various states degradation; will also change. This study is focused on an experimental site near Chersky, northeast Siberia, where drainage ditch was constructed 2004 simulate degradation features that result drier soil channeled flow. We compared levels depths drained area (dry conditions) those adjacent control (wet conditions). identified sources at via stable isotope analysis. found substantial spatiotemporal site: (i) lower tables resulting (ii) quicker flow through areas, (iii) larger saturation zones wetter (iv) higher proportion meltwater liquid phase towards end growing season. These findings suggest decreased throughout area. Shifts hydraulic combination vegetation abundance may impact sinks as well pathways. Identifying patterns degrading therefore crucial.

Language: Английский

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Comment on essd-2024-54

Published: April 15, 2024

Abstract. Considered as the Asian water tower, Qinghai–Xizang Plateau (QXP) processes substantial permafrost, where its hydrological environments are spatially differed and can be easily disturbed by changing permafrost melting ground ice. Permafrost degradation compels to become an important source of surface runoff, changes storage groundwater, greatly influences in regions. However, evidences linking on QXP lacking, which increase uncertainties evaluation results resources. Stable isotopes offer valuable information connections between (ground ice) components. It is therefore particularly observe stable different waterbodies, vary over hourly annual timescales truly capture thawing signals reflect influence regional processes. The Beiluhe Basin (BLH) hinterland were selected, well integrates all components related cycles, ideal site study effect change. This paper presents temporal data (δ¹⁸O, δD, d-excess) bodies (precipitation, stream water, thermokarst lake, groundwater) BLH produced 2017 2022. In special, first detailed isotope ice at 17 boreholes 2 thaw slumps presented. A description sampling processes, sample pretreating isotopic quality control given. firstly described full seasonal amplitude precipitation, stream, lakes, delineated depth variability Totally, 554 precipitation samples, 2402 lakes/ponds 675 102 supra-permafrost 19 sub-permafrost samples collected during six years’ continuous work. Importantly, 359 depths from profiles collected. set provides a new basis for understanding effects QXP. also supports cryospheric Northern Hemisphere.

Language: Английский

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Comment on essd-2024-54

Published: April 17, 2024

Abstract. Considered as the Asian water tower, Qinghai–Xizang Plateau (QXP) processes substantial permafrost, where its hydrological environments are spatially differed and can be easily disturbed by changing permafrost melting ground ice. Permafrost degradation compels to become an important source of surface runoff, changes storage groundwater, greatly influences in regions. However, evidences linking on QXP lacking, which increase uncertainties evaluation results resources. Stable isotopes offer valuable information connections between (ground ice) components. It is therefore particularly observe stable different waterbodies, vary over hourly annual timescales truly capture thawing signals reflect influence regional processes. The Beiluhe Basin (BLH) hinterland were selected, well integrates all components related cycles, ideal site study effect change. This paper presents temporal data (δ¹⁸O, δD, d-excess) bodies (precipitation, stream water, thermokarst lake, groundwater) BLH produced 2017 2022. In special, first detailed isotope ice at 17 boreholes 2 thaw slumps presented. A description sampling processes, sample pretreating isotopic quality control given. firstly described full seasonal amplitude precipitation, stream, lakes, delineated depth variability Totally, 554 precipitation samples, 2402 lakes/ponds 675 102 supra-permafrost 19 sub-permafrost samples collected during six years’ continuous work. Importantly, 359 depths from profiles collected. set provides a new basis for understanding effects QXP. also supports cryospheric Northern Hemisphere.

Language: Английский

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Comment on essd-2024-54

Published: April 21, 2024

Abstract. Considered as the Asian water tower, Qinghai–Xizang Plateau (QXP) processes substantial permafrost, where its hydrological environments are spatially differed and can be easily disturbed by changing permafrost melting ground ice. Permafrost degradation compels to become an important source of surface runoff, changes storage groundwater, greatly influences in regions. However, evidences linking on QXP lacking, which increase uncertainties evaluation results resources. Stable isotopes offer valuable information connections between (ground ice) components. It is therefore particularly observe stable different waterbodies, vary over hourly annual timescales truly capture thawing signals reflect influence regional processes. The Beiluhe Basin (BLH) hinterland were selected, well integrates all components related cycles, ideal site study effect change. This paper presents temporal data (δ¹⁸O, δD, d-excess) bodies (precipitation, stream water, thermokarst lake, groundwater) BLH produced 2017 2022. In special, first detailed isotope ice at 17 boreholes 2 thaw slumps presented. A description sampling processes, sample pretreating isotopic quality control given. firstly described full seasonal amplitude precipitation, stream, lakes, delineated depth variability Totally, 554 precipitation samples, 2402 lakes/ponds 675 102 supra-permafrost 19 sub-permafrost samples collected during six years’ continuous work. Importantly, 359 depths from profiles collected. set provides a new basis for understanding effects QXP. also supports cryospheric Northern Hemisphere.

Language: Английский

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Reply on RC2

Published: May 27, 2024

Abstract. Considered as the Asian water tower, Qinghai–Xizang Plateau (QXP) processes substantial permafrost, where its hydrological environments are spatially differed and can be easily disturbed by changing permafrost melting ground ice. Permafrost degradation compels to become an important source of surface runoff, changes storage groundwater, greatly influences in regions. However, evidences linking on QXP lacking, which increase uncertainties evaluation results resources. Stable isotopes offer valuable information connections between (ground ice) components. It is therefore particularly observe stable different waterbodies, vary over hourly annual timescales truly capture thawing signals reflect influence regional processes. The Beiluhe Basin (BLH) hinterland were selected, well integrates all components related cycles, ideal site study effect change. This paper presents temporal data (δ¹⁸O, δD, d-excess) bodies (precipitation, stream water, thermokarst lake, groundwater) BLH produced 2017 2022. In special, first detailed isotope ice at 17 boreholes 2 thaw slumps presented. A description sampling processes, sample pretreating isotopic quality control given. firstly described full seasonal amplitude precipitation, stream, lakes, delineated depth variability Totally, 554 precipitation samples, 2402 lakes/ponds 675 102 supra-permafrost 19 sub-permafrost samples collected during six years’ continuous work. Importantly, 359 depths from profiles collected. set provides a new basis for understanding effects QXP. also supports cryospheric Northern Hemisphere.

Language: Английский

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Reply on RC3

Published: May 27, 2024

Abstract. Considered as the Asian water tower, Qinghai–Xizang Plateau (QXP) processes substantial permafrost, where its hydrological environments are spatially differed and can be easily disturbed by changing permafrost melting ground ice. Permafrost degradation compels to become an important source of surface runoff, changes storage groundwater, greatly influences in regions. However, evidences linking on QXP lacking, which increase uncertainties evaluation results resources. Stable isotopes offer valuable information connections between (ground ice) components. It is therefore particularly observe stable different waterbodies, vary over hourly annual timescales truly capture thawing signals reflect influence regional processes. The Beiluhe Basin (BLH) hinterland were selected, well integrates all components related cycles, ideal site study effect change. This paper presents temporal data (δ¹⁸O, δD, d-excess) bodies (precipitation, stream water, thermokarst lake, groundwater) BLH produced 2017 2022. In special, first detailed isotope ice at 17 boreholes 2 thaw slumps presented. A description sampling processes, sample pretreating isotopic quality control given. firstly described full seasonal amplitude precipitation, stream, lakes, delineated depth variability Totally, 554 precipitation samples, 2402 lakes/ponds 675 102 supra-permafrost 19 sub-permafrost samples collected during six years’ continuous work. Importantly, 359 depths from profiles collected. set provides a new basis for understanding effects QXP. also supports cryospheric Northern Hemisphere.

Language: Английский

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