Field investigation and numerical modeling of hydrological processes at a hillslope catchment in Hong Kong

Xu, Qing; 徐倩,

doi:10.5353/th_b5153719

Cited by 1 publication

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“…The study headwater catchment is located in the Kadoorie Agricultural Research Centre (KARC) at Shek Kong of Yuen Long District, New Territories, Hong Kong (22 °25′N,114 °07′E) shown in Figure 1A (Li, 2009;Xu, 2013a;Xu, 2013b). The study area covers a total area of 82,737 m 2 with an altitude ranging from 209 m to 550 m (mean elevation = 362 m) shown in Figure 1B.…”

Section: Study Areamentioning

confidence: 99%

Event-scaled hydrological response of a headwater catchment in Hong Kong

Zhang

Wang

et al. 2023

Front. Environ. Sci.

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To improve understanding of rainfall-runoff processes and the fundamental hydrological mechanisms, rainfall and runoff data during six hydrological years (2007/06–2012/06) were collected in a small headwater catchment at the Kadoorie Agricultural Research Centre (KARC) in Shek Kong, Yuen Long District, New Territories, Hong Kong. Totally, 28 storms were selected; using the one parameter filter method, the direct and baseflow hydrographs were obtained. Their runoff coefficients (which are the ratios of direct runoff volumes to the total rainfall volumes) were computed and the values were very low (mean value is less than 2%). At the event scale, the results revealed that the runoff coefficient which represents the catchment response was highly correlated with rainfall depth, maximum 15-min rainfall intensity and initial discharge. Linear relationships were found and two variables (rainfall depth and initial discharge) gave a better result to predict runoff coefficient indicating that hydrological response depended both on rainfall depth and initial discharge. The principal component analysis and cluster method were used to discriminate types of hydrological responses. Three types of characteristics of hydrological behavior were identified. The different types of hydrological responses show similar characteristics such as the quick rise and the prolonged recession. This study highlights the importance of interflow in the rainfall-runoff process and provides insight into the relationship between rainfall and runoff. The findings have significant implications for water resources management and will help inform decision-making processes.

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Section: Study Areamentioning

confidence: 99%