Hydrologic Modeling of an Agricultural Watershed with Tile Drains and GIS

Tile Drain 의 영향과 GIS를 연계한 농경지 유역에 대한 수문학적 모의


Abstract

A physically based model for rainfall-runoff simulation in agricultural watersheds equipped with tile drains is developed from the TOPMODEL framework. The model is based on detailed topographical information provided by the Digital Elevation Model (DEM), which is available in the Geographic Information System GRASS. Nine possible flow generation scenarions are suggested and used in the development of the model. The storage and delaying effects in the soil matrix and in the tile system are simulated with a second order linear reservoir. The model can identify the portions of the hydrators resulting from tile flow, subsurface flow and surface runoff.

Tile drain의 특성을 갖는 농경지 유역에서의 강우-유출 모의를 위한 물리모형이 TOPMODEL 구조로부터 개발되었다. 본 모형은 GRASS 지리정보시스템에 의해서 DEM으로부터 제공되는 세부적인 지형정보를 기초자료로 하여 연구되었다. 9개의 가능한 흐름발생 시나리오가 제안되었고 모형개발 과정에 사용되었다. 토양 메트릭스와 tile 시스템에 있어서의 저류 및 지체효과가 2차 선형 저수지와 함께 모의되었다. 본 연구모형으로부터 tile 흐름, 지표하 흐름 및 지표면 흐름으로부터 야기되는 유출특성을 규명할 수 있었다.

Keywords

References

  1. Hydrological Science Journal v.29 Infiltration into a class of vertically non-uniform soils Beven, K.J.
  2. Hydrologic Science Bulletine v.24 no.1 A physically based variable contributing area model of basin hydrology Beven, K.J.;Kirkby, M.J.
  3. Computer models of watershed hydrology TOPMODEL Beven, K.;Lamb, R.;Quinn, P.;romanavicz, R.;Freer, J.;V.P. Singh(ed.)
  4. Groundwater hydrology Bouwer, H.
  5. Water Resources Research v.6 no.5 Partial area contributing to storm runoff in a small New England watershed Dunne, T.;Black, R.D.
  6. Transactions, American Geophysical Union v.14 The role of infiltration in the hydrologic cycle: Eos Horton, R.E.
  7. Hydrological Process v.5 The prediction of hillslope flow path for distributed hydrological modelling using digital terrain models Quinn, P.;Beven, K.;Chevaiiler, P.;Planchon, O.
  8. Water Resources Research v.26 On hydrological similarity: 3. A dimensionless flood frequency distribution Sivapalan, M.;Wood, E.F.;Beven, K.J.
  9. GRASS 4.0 User's reference manual USACERL