東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Three-dimensional volume averaged so...

Choi, Hyun Il.

Linked to FindBook

Google Book

Amazon

博客來

Three-dimensional volume averaged soil-moisture transport model: A scalable scheme for representing subgrid topographic control in land-atmosphere interactions.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Three-dimensional volume averaged soil-moisture transport model: A scalable scheme for representing subgrid topographic control in land-atmosphere interactions./
Author:	Choi, Hyun Il.
Description:	189 p.
Notes:	Adviser: Praveen Kumar.
Contained By:	Dissertation Abstracts International67-11B.
Subject:	Engineering, Environmental. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3242821
ISBN:	9780542988158

Three-dimensional volume averaged soil-moisture transport model: A scalable scheme for representing subgrid topographic control in land-atmosphere interactions.
Choi, Hyun Il.

Three-dimensional volume averaged soil-moisture transport model: A scalable scheme for representing subgrid topographic control in land-atmosphere interactions. - 189 p.

Adviser: Praveen Kumar.

Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006.

Climate models, both global and regional, have increased in sophistication and are being run at increasingly higher resolutions. The land surface models (LSMs) coupled to these climate models have also evolved from simple bucket models to the new generation models needed to support sophisticated linkages and process interactions. In most current LSMs, however, soil-moisture transport equations limited to the vertical soil-moisture transport are unable to capture the spatial variability of soil water, and thus models have the limited predictability for land surface fluxes as well. Moreover, these models simplistically estimate the surface runoff from the soil water budget, and ignore the role of surface flow depth on the infiltration rate, which may result in a mass balance error in the terrestrial hydrologic cycle.

ISBN: 9780542988158Subjects--Topical Terms:

783782
Engineering, Environmental.

Three-dimensional volume averaged soil-moisture transport model: A scalable scheme for representing subgrid topographic control in land-atmosphere interactions.
LDR:03311nam 2200289 a 45 001 969397
005 20110920
008 110921s2006 eng d
020 $a 9780542988158
035 $a (UMI)AAI3242821
035 $a AAI3242821
040 $a UMI $c UMI
100 1 $a Choi, Hyun Il. $3 1293450
245 1 0 $a Three-dimensional volume averaged soil-moisture transport model: A scalable scheme for representing subgrid topographic control in land-atmosphere interactions.
300 $a 189 p.
500 $a Adviser: Praveen Kumar.
500 $a Source: Dissertation Abstracts International, Volume: 67-11, Section: B, page: 6268.
502 $a Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006.
520 $a Climate models, both global and regional, have increased in sophistication and are being run at increasingly higher resolutions. The land surface models (LSMs) coupled to these climate models have also evolved from simple bucket models to the new generation models needed to support sophisticated linkages and process interactions. In most current LSMs, however, soil-moisture transport equations limited to the vertical soil-moisture transport are unable to capture the spatial variability of soil water, and thus models have the limited predictability for land surface fluxes as well. Moreover, these models simplistically estimate the surface runoff from the soil water budget, and ignore the role of surface flow depth on the infiltration rate, which may result in a mass balance error in the terrestrial hydrologic cycle.
520 $a In this research, the 3-D Volume Averaged Soil-moisture Transport (VAST) formulation is derived from the Richards equation to incorporate the lateral flow and subgrid heterogeneity due to topography. A conjunctive surface-subsurface flow model at a large scale, a 1-D Diffusion Wave (DW) surface flow model interacting with the 3-D VAST model, is developed for the comprehensive terrestrial water and energy predictions in LSMs. For the implementation of the model, the mixed numerical scheme using a time splitting method is employed for each flow component. This research also focuses on the development and construction of appropriate Surface Boundary Conditions (SBCs) for mesoscale Regional Climate Model (RCM) applications. This conjunctive flow model is substituted for the existing 1-D scheme in the Common Land Model (CLM), one of state-of-the-art LSMs. The new coupled model (CLM+VAST) performance is investigated using the new SBCs and the North American Regional Reanalysis (NARR) forcing data in the off-line mode for a study domain around the Ohio Valley region. The simulation results show that the lateral and subgrid fluxes play a significant role in total soil-moisture dynamics, and the interaction between surface and subsurface flows and the flow routing scheme improve the runoff predictability significantly in the new model. The new coupled model using realistic SBCs can provide a full suite of modeling capability to characterize surface water and energy fluxes.
590 $a School code: 0090.
650 4 $a Engineering, Environmental. $3 783782
650 4 $a Hydrology. $3 545716
690 $a 0388
690 $a 0775
710 2 0 $a University of Illinois at Urbana-Champaign. $3 626646
773 0 $t Dissertation Abstracts International $g 67-11B.
790 $a 0090
790 1 0 $a Kumar, Praveen, $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3242821