| Title: | Hydrologic modeling of flow through sinkholes located in streambeds of Cane Run Stream, Kentucky |
| Authors: | Palanisamy, B. and S. R. Workman |
| Year: | 2015 |
| Journal: | Journal of Hydrologic Engineering |
| Volume (Issue): | 20(5) |
| Pages: | |
| Article ID: | |
| DOI: | 10.1061/(ASCE)HE.1943-5584.0001060 |
| URL (non-DOI journals): | |
| Model: | KarstSWAT |
| Broad Application Category: | hydrologic only |
| Primary Application Category: | karst effects |
| Secondary Application Category: | model comparison |
| Watershed Description: | 115.6 km^2 Cane Run River, located in portions of Fayette and Scott counties in north central Kentucky, U.S. |
| Calibration Summary: | |
| Validation Summary: | |
| General Comments: | |
| Abstract: | Hydrologic modeling of karst watersheds requires detailed information on geologic settings and hydrologic properties for efficient simulation of spring and streamflow hydrographs. In this paper, sinkholes located in the streambed of a karst watershed in Kentucky were conceptualized as orifices, and flow through these orifices was modeled as a function of sinkhole diameter. The karst flow components were incorporated in a soil and water assessment tool (SWAT), called KarstSWAT in this study. The KarstSWATwas able to reproduce the observed hydrographs better than the SWAT model in terms of both peak flow and hydrograph volume. Flow through a groundwater basin that is partly
fed by the sinkholes and is discharged from a spring was estimated using a method called the successive summation routing algorithm (SSRA) in this study. The time series analysis of simulated spring flows showed that the quantity of water recharging the sinkholes was sufficient to reproduce the observed spring hydrographs. The proposed method could be adapted to karst watersheds dominated by sinkholes and to watersheds that drain water from sinkholes to springs. DOI: 10.1061/(ASCE)HE.1943-5584.0001060. © 2014 American Society of Civil Engineers. |
| Language: | English |
| Keywords: | Karst; Sinkholes; Recharge basins; Hydrologic models; Flow routing |