Impacts of forest structure on precipitation interception and run‐off generation in a semiarid region in northern China

Liu, Jiakai; Zhang, Zhenming; Zhang, Mingxiang

doi:10.1002/hyp.13156

Cited by 25 publications

(23 citation statements)

References 67 publications

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“…This was because low intensity P's were likely to be retained at the soil surface layer (Li et al 2016). The variability in SM of the surface layer was even more distinct in Bansigad catchment, showing low interception losses due to degraded forest, resulting in a large proportion of rainfall reaching the ground surface (Venkatraman and Ashwath 2016;Liu et al 2018) and therefore, the Bansigad catchment showed higher (4%, annually) moisture regimes in surface layer than that for Arnigad (Fig. 7b).…”

Section: Soil Moisture Variation At Different Soil Profilesmentioning

confidence: 94%

Hydrological functioning of forested catchments, Central Himalayan Region, India

Qazi

2020

For. Ecosyst.

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Background Central Himalayan forested catchments provide fresh water supply and innumerable ecosystem services to millions of people. Hence, the understanding of linkages between forests and water is very crucial for availability and quality of water at catchment scale. Therefore, the present study aims to understand the hydrological response of two forested catchments (namely, Arnigad and Bansigad) in the Central Himalayan Region. Methods Three-years’ data (March, 2008 to February, 2011) were collected from meteorological and hydrological stations in Arnigad and Bansigad catchments. The present paper describes the mean hydrological response of these forested catchments investigated through detailed field investigation. Results The annual hyetograph analysis revealed that the rainfall at both the catchments was highly seasonal, and wet-period (June–September) plays a key role in catchment functioning. Exceedance of rainfall threshold of ~ 200 mm (~ 10% of annual rainfall) significantly increased streamflow generation in both catchments. In Arnigad, the stream was perennial with a mean baseflow of ~ 83 mm per month (~ 6% of annual baseflow) whereas, Bansigad had greater seasonality due to lack of streamflow during the pre-wet-period (March–May). Separation of hydrographs in Arnigad and Bansigad catchments i.e. stormflow (6% and 31%, respectively) and baseflow (50% and 32%, respectively) helped to understand the probability of flooding during wet-period and drought during dry-period. The forest ecosystem in Arnigad displayed healthier hydrological functioning in terms of reduced stormflow (82%), and enhanced baseflow (52%), soil moisture (13%), steady infiltration rate (22%) and lag time (~ 15 min) relative to Bansigad. These enhanced values indicated soil capability to store water in the forested catchment (Arnigad) and helped to understand the volume of water (discharge) that was available during dry-period. The lower denudation rate at Arnigad by 41% resulted in decreased suspended sediment (18%) and bed load (75%) compared to Bansigad. Further, the enhanced dissolved solids in the Arnigad stream resulted from the higher organic matter generated in the forest floor. Conclusion This study shows that rainfall during the wet-period was the main driver of hydrological functioning, whereas, forests provided substantial services by regulating water balance, soil moisture and sediment budget through different mechanisms of forest components at catchment-scale in the Central Himalayan Region.

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Section: Soil Moisture Variation At Different Soil Profilesmentioning

confidence: 94%

Hydrological functioning of forested catchments, Central Himalayan Region, India

Qazi

2020

For. Ecosyst.

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“…This was because when rainfall amount was too small, most of them were retained on the surface layer only (Li et al, 2016). The difference in SM at surface layer was even more distinct at Bansigad catchment, shows low interception losses due to degraded forest at Bansigad, resulting large volume of rainfall could reach to the ground surface (Liu et al, 2018;Venkatraman and Ashwath, 2016) and therefore, the Bansigad catchment shows higher (4%, annually) moisture regimes at surface layer than Arnigad (Fig. 7B).…”

Section: Soil Moisture Functioning At Different Soil Profilesmentioning

confidence: 96%

Hydrological Functioning of Forested Catchments, Western Himalayan Region, India.

Qazi¹

2020

Preprint

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Background Forests, being the largest ecosystem and primary consumer of water, significantly affect the hydrological cycle at both global and local level and provide innumerable ecosystem services to humans. Western Himalayan forested catchments provide fresh water supply to millions of people. Hence, the understanding of linkages between forests and water is very crucial to recognize for availability and quality of water at catchment scale. Therefore, present study aims to understand hydrological response of two forested catchments (namely, Arnigad and Bansigad) in the Western Himalayan Region.Methods Three-year data (March, 2008 to February, 2011) were collected from meteorological and hydrological stations installed at Arnigad and Bansigad catchments. The present paper displays average hydrological response of forested catchments through detailed field investigation.Results The annual hyetograph analysis reveals that the rainfall at both the catchments were highly seasonal, and wet-period (June-September) plays a key role in catchment functioning. Exceedance of rainfall threshold of ~288 mm (~10% of annual rainfall) significantly increased streamflow generation at both the catchments. At Arnigad, stream was perennial with a mean baseflow of ~80 mm per month (~5% of annual streamflow) whereas, Bansigad had greater seasonality due to lack of flow during the pre-wet-period (March-May). Separation of hydrographs at Arnigad and Bansigad catchments i.e. stormflow (6% and 31%, respectively) and baseflow (50% and 32%, respectively) helps to understand the probability of flooding during wet-period and drought during dry-period. Forest ecosystem at Arnigad improves the hydrological functioning by: reducing stormflow (82%), and enhancing baseflow (52%), soil moisture (13%), steady infiltration rate (22%) and by increasing lag time (~15 minutes) relative to Bansigad. These enhanced values indicated potential for soil to store water at forested catchment (Arnigad) and helps to understand the volume of water that is available during dry-period. The decrease of denudation rate (at Arnigad) by 41% resulting in decrease of suspended sediment (18%) and bed load (75%) compared to Bansigad. Further, the enhancement of dissolved solids in stream resulted due to maximum organic matter generated in forest floor of Arnigad. Conclusion This study confirms the crucial role of forests in maintaining hydrological balances at catchment scale in the Western Himalayan region.

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“…The influences on precipitation mainly manifest in the canopy interception and stem redistribution of precipitation, of which the canopy interception is mainly affected by vegetation types, canopy density and forest structure complexity [57][58][59].…”

Section: Basic Theorymentioning

confidence: 99%

Disentangling the Mutual Feedback Relationship between Extreme Drought and Flood Events and Ecological Succession of Vegetation

Dong¹,

Qin²,

Liu³

et al. 2021

Pol. J. Environ. Stud.

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In the context of climate change, the extreme precipitation events over most of the mid-latitude land masses and over wet tropical regions will very likely become more intense and more frequent, which may cause increases in the intensity and frequency of extreme drought or flood events. To explore the mechanism of dynamic and functional changes in ecosystems driven by extreme drought and flood events (EDFEs) in the future and the interaction between the two, this study focuses on the mutual feedback relationship between EDFEs and the ecological succession of vegetation. To accomplish this target, we reviewed relevant studies of the impacts of EDFEs on vegetation ecology (including growth status and living states) and that of feedback of ecological succession of vegetation to EDFEs. This study is of great significance for accurately predicting the future dynamic succession of plant communities, and the circulation of materials of future ecosystem with ongoing climate change, which provides fundamental and scientific basis for the establishment of ecological protection and restoration strategies in response to frequent climate extremes.

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Impacts of forest structure on precipitation interception and run‐off generation in a semiarid region in northern China

Cited by 25 publications

References 67 publications

Hydrological functioning of forested catchments, Central Himalayan Region, India

Hydrological functioning of forested catchments, Central Himalayan Region, India

Hydrological Functioning of Forested Catchments, Western Himalayan Region, India.

Disentangling the Mutual Feedback Relationship between Extreme Drought and Flood Events and Ecological Succession of Vegetation

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