• Title/Summary/Keyword: 수정 TOPMODEL

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Runoff Analysis of Modified TOPMODEL with Subsurface Storm Flow Generation Mechanism (지표하 흐름을 고려한 개선된 TOPMODEL의 유출분석연구)

  • Lee, Hak-Su;Han, Ji-Yeong;Kim, Gyeong-Hyeon;Kim, Sang-Hyeon
    • Journal of Korea Water Resources Association
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    • v.34 no.4
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    • pp.403-411
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    • 2001
  • This paper investigates the applicability of a modified version of TOPMODEL considering shallow subsurface storm flow in a forested mountaneous catchment. The macroporous soil structure provides a hydrological pathway for rapid runoff generation. A modified version of TOPMODEL introduces the two-storage system to analyze the hydrograph recession including rapid subsurface storm flow component. The two-month continuous hydrologic simulations of sulmachun watershed suggest that a modified version of TOPMODEL represents comprehensive and realistic flow generation mechanism comparing to those of an original version of TOPMODEL. The results of parameter calibration with Monte-Carlo method indicate a modified version of TOPMODEL produces a set of physically meaningful parameters.

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Generalization of Modified TOPMODEL for Rainfall-Runoff Analysis of Sulmachun Watershed (수정 TOPMODEL에 의한 유출해석과 일반화 (설마천 유역을 중심으로))

  • Lee, Hak-Su;Kim, Nam-Won;Kim, Sang-Hyeon
    • Journal of Korea Water Resources Association
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    • v.35 no.3
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    • pp.295-306
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    • 2002
  • The modified TOPMODEL of two storage systems has been integrated to the generalized assumptions of decreasing hydraulic conductivity to vertical direction. Three different recharge functions were introduced to explore the impact of the macropore flow to vortical direction, the storage at the surface zone and the relative storage deficit of the soil matrix. Combinations of these approaches provide 30 type of the model structure for the hillslope hydrology. Developed models have been applied to several hydrologic events at the Sulmachun watershed. The performance evaluation with the Monte carlo simulation suggests that the exponential function of transmissivity reduction should be appropriate form for the physically -based hydrologic simulation on the Sulmachun watershed. It has been shown that the recharge function of macropore flow contributes to improve the predictability of the generalized version of modified TOPMODEL.

The Influence of the Infinitive Flow Direction Algorithm and Horn Slope Algorithm on the Topographic Index and Hydrological Responses of the TOPMODEL (무한 유향 알고리듬과 Horn 경사 알고리듬이 TOPMODEL 지형지수와 수문반응에 미치는 영향)

  • Byun, Jong-Min;Kim, Jong-Wook
    • Journal of the Korean Geographical Society
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    • v.44 no.3
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    • pp.207-223
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    • 2009
  • The TOPMODEL Topographic Index (TI) is widely used to predict the spatial distribution of soil moisture contents, The TI is one of terrain indices which are frequently used in spatially distributed environmental modelings. There have been studies on the evaluation and improvement of the TI. Most of them. however, have focused on only the modified multiple flow direction algorithm and algorithms for slope calculation have been paid little attention, In this research, we attempted to improve the TI by utilizing the infinitive flow direction (Dinf) algorithm and Horn slope algorithm. Then we attempt to analyze and evaluate the influence of the improved TI on hydrological responses of the TOPMODEL As a result. our approaching using the infinitive flow direction (Dinf) and Horn slope algorithm made the TI better than the multiple flow direction (MD8) - the multiple descent slope (MDS) algorithm. However, the model efficiency of discharges at the outlet was not increased. Our research may provide an insight to choose appropriate algorithms for calculating flow direction and slope in spatially distributed environmental modelings.

Hydrologic Utilization of Radar-Derived Rainfall (II) Uncertainty Analysis (레이더 추정강우의 수문학적 활용 (II): 불확실성 해석)

  • Kim Jin-Hoon;Lee Kyoung-Do;Bae Deg-Hyo
    • Journal of Korea Water Resources Association
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    • v.38 no.12 s.161
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    • pp.1051-1060
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    • 2005
  • The present study analyzes hydrologic utilization of optimal radar-derived rainfall by using semi-distributed TOPMODEL and evaluates the impacts of radar rainfall and model parametric uncertainty on a hydrologic model. Monte Carlo technique is used to produce the flow ensembles. The simulated flows from the corrected radar rainfalls with real-time bias adjustment scheme are well agreed to observed flows during 22-26 July 2003. It is shown that radar-derived rainfall is useful for simulating streamflow on a basin scale. These results are diagnose with which radar-rainfall Input and parametric uncertainty influence the character of the flow simulation uncertainty. The main conclusions for this uncertainty analysis are that the radar input uncertainty is less influent than the parametric one, and combined uncertainty with radar and Parametric input can be included the highest uncertainty on a streamflow simulation.