2026-09-20T04:20:45Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/83243 2023-07-11 col_2142_5131 col_2142_14770 com_2142_5130 com_2142_3518 com_2142_234

Lian, Yanqing 2015-09-25T21:03:48Z 2015-09-25T21:03:48Z 10000-01-01 2004 2004 Valocchi, Albert J. Kumar, Praveen This research developed a physically based conjunctive flow model (CFM) coupling two-dimensional surface three-dimensional subsurface transport to simulate the total runoff in watersheds. In conjunction with the CFM, an overland flow-tracking program (OFTP) was developed to compute the PCA under the proposed definitions. The model can compute the saturated area (SA), and can separate the total PCA-1 and PCA-2 into the fraction due to saturation overland flow and Hortonian overland flow mechanisms. Application of the CFM and the OFTP to the North Creek watershed in Illinois proved that the CFM is applicable to a real watershed with reasonable accuracy for flow simulations, and also that the PCAs in a real watershed can be computed with scientific and meaningful definitions. This research also showed that the SA in a real watershed was often larger than the PCA. Theoretically, the PCA-2 and SA values would be identical if the entire SA were to contribute flow to the total runoff. Most importantly, the comparison of PCA from the CFM and from the TOPMODEL indicated that TOPMODEL PCA belongs to PCA-2. The SA is often used as the actual PCA in many hydrologic models, which can potentially overestimate the runoffs. Made available in DSpace on 2015-09-25T21:03:48Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3153363.pdf: 12268971 bytes, checksum: 1bcea10bbe4ffa8ef1ce0a5ed342d903 (MD5) Previous issue date: 2004 Embargo set by: Seth Robbins for item 84524 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 143 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2004. http://hdl.handle.net/2142/83243 (MiAaPQ)AAI3153363 eng Hydrology Investigation of Partial Contributing Areas in Watersheds With a Conjunctive Surface Subsurface Flow Model text Civil and Environmental Engineering Civil and Environmental Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.