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Dr. Yeo Howe Lim
University of North Dakota

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Research Keywords & Expertise

0 Water Resource Engineering
0 hydraulic engineering
0 Watershed Management, Monitoring and Modelling
0 Lake and river flow regime
0 Hydraulic Structure Design

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Journal article
Published: 16 October 2020 in Water
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On the basis of the two-component pressure approach, we developed a numerical model to capture mixed transient flows in close conduit systems. To achieve this goal, an innovative Godunov finite-volume numerical scheme is proposed to suppress the spurious numerical oscillations occurring during rapid pipe pressurization. To dissipate the spurious numerical oscillations, we admit artificial numerical viscosity to the numerical scheme through applying a proposed Harten, Lax, and van Leer (HLL) Riemann solver for calculating the numerical fluxes at the computational cell interfaces. The proposed solver controls the magnitude of the numerical viscosity through adjusting the left and right wave velocities. A wave velocity calculator is proposed to optimally distribute the numerical viscosity over several computational cells around the computational cell in which the pressurization front is located. The proposed solver admits significant artificial numerical viscosity when the pipe pressurization is imminent and automatically reduces it in other places; in this way the numerical diffusion and data smearing is minimized. The validity of the proposed model is justified by the aid of several test cases in which the numerical results are compared with both experimental data and the results obtained from analytical methods. The results reveal that the proposed model succeeds in completely removing the spurious numerical oscillations, even when the pipe acoustic speed is over 1000 m/s. The numerical results also show that the model can successfully capture occurrence of negative pressures during the course of transient flow.

ACS Style

David Khani; Yeo Howe Lim; Ahmad Malekpour. Hydraulic Transient Analysis of Sewer Pipe Systems Using a Non-Oscillatory Two-Component Pressure Approach. Water 2020, 12, 2896 .

AMA Style

David Khani, Yeo Howe Lim, Ahmad Malekpour. Hydraulic Transient Analysis of Sewer Pipe Systems Using a Non-Oscillatory Two-Component Pressure Approach. Water. 2020; 12 (10):2896.

Chicago/Turabian Style

David Khani; Yeo Howe Lim; Ahmad Malekpour. 2020. "Hydraulic Transient Analysis of Sewer Pipe Systems Using a Non-Oscillatory Two-Component Pressure Approach." Water 12, no. 10: 2896.

Conference paper
Published: 14 May 2020 in World Environmental and Water Resources Congress 2020
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The introduction of spur dikes into a river flow field can help to improve the stability of a river channel. While the flow velocity directly at the spur dike tip or crest may increase, a large embayment area downstream of the spur dike will form with reduced flow velocities. Due to the increase in flow velocity at the spur dike, a scour hole will form. Many hydraulic structures are tested by building scaled models, which is very costly and lacks versatility to model all factors correctly. The use of two-dimensional numerical models allows for increased efficiency and accuracy of hydraulic modeling. This allows for enhancing relationships between dynamic variables and the estimated scour depth. The length of the spur dike and the flow rate were varied in the experiments. It was found that as the length of a spur dike increases, the depth of the scour also increases. This held a stronger correlation than the increase in flow rate. A relationship was developed between the maximum flow velocity, the upstream flow velocity, and the upstream Froude number to determine the maximum scour depth. This relationship proved to be more accurate than past relationships proposed using data from physical model analysis. The new relationship lowered the percentage-error from 14% to 1% when the predicted scour depths were compared with the measured scour depths. The error was reduced from 7.3% to 1.6% for the long spur dike simulations and from 21.4% to 13.2% for the short spur dike simulations.

ACS Style

Yeo Howe Lim; Mathew Lee Cox. Enhancing Maximum Scour Depth Determination for Spur Dikes Using a Validated Two-Dimensional Model. World Environmental and Water Resources Congress 2020 2020, 84 -98.

AMA Style

Yeo Howe Lim, Mathew Lee Cox. Enhancing Maximum Scour Depth Determination for Spur Dikes Using a Validated Two-Dimensional Model. World Environmental and Water Resources Congress 2020. 2020; ():84-98.

Chicago/Turabian Style

Yeo Howe Lim; Mathew Lee Cox. 2020. "Enhancing Maximum Scour Depth Determination for Spur Dikes Using a Validated Two-Dimensional Model." World Environmental and Water Resources Congress 2020 , no. : 84-98.

Conference paper
Published: 14 May 2020 in World Environmental and Water Resources Congress 2020
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A stilling basin, is often optimized in dimensions based on the characteristics of hydraulic jumps formed within the basin. Many types of energy dissipators are used to shorten the jump-length and hence, reducing the length of basin. A study was conducted to investigate the effectiveness of six-legged concrete (SLC) elements as dissipators. Models of these elements were placed on the bed of an experimental flume downstream of a spillway chute in different densities of the SLC elements. The incoming flow had Froude number in the range of 5.3 to 8.1. The results indicate that the greatest reduction of sequent depth ratio and dimensionless length of jump occur when the density of elements is 36%. The average reduction of hydraulic jump length on the roughened bed for densities of 36%, 63%, and 100% is 29% and at 23% and 17%, respectively, in comparison with the smooth bed.

ACS Style

Vida Attashi; Yeo Howe Lim; Maryam Khajavi; Mahmood Shafai-Bajestan. Characteristics of Hydraulic Jumps in Stilling Basins with Permeable Six-Legged Elements. World Environmental and Water Resources Congress 2020 2020, 65 -75.

AMA Style

Vida Attashi, Yeo Howe Lim, Maryam Khajavi, Mahmood Shafai-Bajestan. Characteristics of Hydraulic Jumps in Stilling Basins with Permeable Six-Legged Elements. World Environmental and Water Resources Congress 2020. 2020; ():65-75.

Chicago/Turabian Style

Vida Attashi; Yeo Howe Lim; Maryam Khajavi; Mahmood Shafai-Bajestan. 2020. "Characteristics of Hydraulic Jumps in Stilling Basins with Permeable Six-Legged Elements." World Environmental and Water Resources Congress 2020 , no. : 65-75.

Conference paper
Published: 16 May 2019 in World Environmental and Water Resources Congress 2019
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ACS Style

Yeo Howe Lim; Alexa R. Ducioame. The Performance of Streambank Stabilization Assessment Modeling: A Case Study of Tongue River in North Dakota. World Environmental and Water Resources Congress 2019 2019, 1 .

AMA Style

Yeo Howe Lim, Alexa R. Ducioame. The Performance of Streambank Stabilization Assessment Modeling: A Case Study of Tongue River in North Dakota. World Environmental and Water Resources Congress 2019. 2019; ():1.

Chicago/Turabian Style

Yeo Howe Lim; Alexa R. Ducioame. 2019. "The Performance of Streambank Stabilization Assessment Modeling: A Case Study of Tongue River in North Dakota." World Environmental and Water Resources Congress 2019 , no. : 1.

Conference paper
Published: 16 May 2019 in World Environmental and Water Resources Congress 2019
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ACS Style

Bahareh Shoghli; Yeo Howe Lim; Sajad Ahmad Hamidi. Impact of Climate Change on Sediment and Nitrate Accumulation on Lake Ashtabula in North Dakota. World Environmental and Water Resources Congress 2019 2019, 1 .

AMA Style

Bahareh Shoghli, Yeo Howe Lim, Sajad Ahmad Hamidi. Impact of Climate Change on Sediment and Nitrate Accumulation on Lake Ashtabula in North Dakota. World Environmental and Water Resources Congress 2019. 2019; ():1.

Chicago/Turabian Style

Bahareh Shoghli; Yeo Howe Lim; Sajad Ahmad Hamidi. 2019. "Impact of Climate Change on Sediment and Nitrate Accumulation on Lake Ashtabula in North Dakota." World Environmental and Water Resources Congress 2019 , no. : 1.

Conference paper
Published: 31 May 2018 in World Environmental and Water Resources Congress 2018
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Streamflow predication is one of the important tasks in water management. It is needed in operation and optimization of water resources, flood control, preventing dam failure, and design of hydraulic structures. Accuracy of these predictions have great influence on the water resource management and decision making. Various model and tool packages have been developed for simulation and prediction of streamflow, and soil and water assessment tool (SWAT) is one of the most applicable package. Simulation results of the SWAT indicate that this tool has deficiencies in simulating peak streamflow events of the cold regions which are generated by snow melting processes. Since global temperature is projected to be increased and the phenomena will change the snow melting characteristics in the snow dominant areas, such as the time of first melt and rate of melting. The concurrence of these processes and high precipitation will cause more flooding problems in these regions. In this study, we used a method for improving the SWAT simulation results. This method is to develop the SWAT-CUP in the steps of calibration and validation. Improved simulation results showed about 50% raised in simulating results.

ACS Style

Bahareh Shoghli; Yeo Howe Lim; Omidreza Shoghli. Evaluating SWAT Potential in Simulating Watersheds in Two Different Types of Climatic Conditions. World Environmental and Water Resources Congress 2018 2018, 1 .

AMA Style

Bahareh Shoghli, Yeo Howe Lim, Omidreza Shoghli. Evaluating SWAT Potential in Simulating Watersheds in Two Different Types of Climatic Conditions. World Environmental and Water Resources Congress 2018. 2018; ():1.

Chicago/Turabian Style

Bahareh Shoghli; Yeo Howe Lim; Omidreza Shoghli. 2018. "Evaluating SWAT Potential in Simulating Watersheds in Two Different Types of Climatic Conditions." World Environmental and Water Resources Congress 2018 , no. : 1.

Conference paper
Published: 18 May 2017 in World Environmental and Water Resources Congress 2017
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ACS Style

Yeo Howe Lim; Derrick D. Deering; Christopher N. Dunn; Brian Van Weele. Modeling Chlorine Residual in a Ground Water Supply Tank for a Small Community in Cold Conditions. World Environmental and Water Resources Congress 2017 2017, 124 -138.

AMA Style

Yeo Howe Lim, Derrick D. Deering, Christopher N. Dunn, Brian Van Weele. Modeling Chlorine Residual in a Ground Water Supply Tank for a Small Community in Cold Conditions. World Environmental and Water Resources Congress 2017. 2017; ():124-138.

Chicago/Turabian Style

Yeo Howe Lim; Derrick D. Deering; Christopher N. Dunn; Brian Van Weele. 2017. "Modeling Chlorine Residual in a Ground Water Supply Tank for a Small Community in Cold Conditions." World Environmental and Water Resources Congress 2017 , no. : 124-138.

Conference paper
Published: 18 May 2017 in World Environmental and Water Resources Congress 2017
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ACS Style

Bahareh Shoghli; Yeo Howe Lim; Christopher N. Dunn; Brian Van Weele. Evaluating SWAT Potential in Simulating Watersheds in Two Different Types of Climatic Conditions. World Environmental and Water Resources Congress 2017 2017, 340 -352.

AMA Style

Bahareh Shoghli, Yeo Howe Lim, Christopher N. Dunn, Brian Van Weele. Evaluating SWAT Potential in Simulating Watersheds in Two Different Types of Climatic Conditions. World Environmental and Water Resources Congress 2017. 2017; ():340-352.

Chicago/Turabian Style

Bahareh Shoghli; Yeo Howe Lim; Christopher N. Dunn; Brian Van Weele. 2017. "Evaluating SWAT Potential in Simulating Watersheds in Two Different Types of Climatic Conditions." World Environmental and Water Resources Congress 2017 , no. : 340-352.

Conference paper
Published: 16 May 2016 in World Environmental and Water Resources Congress 2016
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In climate change conditions, warmer temperature accompanied by greater precipitation could lead to the formation of larger snowpack and earlier spring melting of the snowpack, which in turn could increase the magnitude of runoff in a cold region basin. Conversely, lower temperatures accompanied by lesser precipitation could lead to a decrease in runoff within the basin. Both scenarios, along with other climate change scenarios, could alter the basin runoff in a confounding manner and challenge the validity of parameters used in the designs of embankment dams. Spillways, stilling basins, and outlet structures will be impacted most as compared with other appurtenances of the dams. Rivers emptying into reservoirs deposit sediments on the bottom of reservoirs, and the built up over the productive years could decrease the water storage volume. In the scenario with greater precipitation and surface runoff, the frequency of having flooding and overtopping events increases. The above climate change impact factors were investigated for Renwick Dam in North Dakota by having the upper basin areas modeled by HEC-HMS and SWAT. After both models were calibrated, the behaviors of the reservoir during the future time periods were simulated using downscaled climate change data as the inputs. The results provided by both models are compared. There are interesting differences observed. A sensitivity analysis scheme is also used to derive some rational inferences on the uncertainties of the model calibration results and the implications of the design parameters.

ACS Style

Bahareh Shoghli; Yeo Howe Lim; Jamal Alikhani. Evaluating the Effect of Climate Change on the Design Parameters of Embankment Dams: Case Studies Using Remote Sensing Data. World Environmental and Water Resources Congress 2016 2016, 1 .

AMA Style

Bahareh Shoghli, Yeo Howe Lim, Jamal Alikhani. Evaluating the Effect of Climate Change on the Design Parameters of Embankment Dams: Case Studies Using Remote Sensing Data. World Environmental and Water Resources Congress 2016. 2016; ():1.

Chicago/Turabian Style

Bahareh Shoghli; Yeo Howe Lim; Jamal Alikhani. 2016. "Evaluating the Effect of Climate Change on the Design Parameters of Embankment Dams: Case Studies Using Remote Sensing Data." World Environmental and Water Resources Congress 2016 , no. : 1.

Conference paper
Published: 16 May 2016 in World Environmental and Water Resources Congress 2016
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Many structural best management practices (BMPs) were installed as part of the storm drainage system in a city in North Dakota. The designs of existing BMPs were largely dependent on the state and city’s runoff volume requirements, rather than the pollutant removal efficiency of the BMPs. The framework for assessment of the efficiency of a BMP in a cold region was limited, and hence, an initiative was carried out to gauge the performance of the existing BMPs. An assessment plan, including monitoring hydrologic and water quality parameters, was established before the arrival of any spring runoff. Based on the successful captures of the first summer’s storm events, the performance of a BMP was assessed. The average removal efficiency of the nutrients was 73% for total phosphorus and 40% for nitrate as nitrogen. Conductivity was found to increase between the influent and the effluent concentrations. Measurements on total suspended solids, phosphate and bacteria showed certain removal efficiency, but were not proven to be statistically significant. Parameters of ammonia as nitrogen, nitrite as nitrogen, total copper, total lead, total zinc, chloride, pH, and dissolved oxygen did not suggest effective removal trends. Attenuations of storm peaks were confirmed. A continuation of the assessment plan was carried out in the second summer using two more automatic samplers. However, inconsistent results were found for cases of incomplete sampling over the full-event times. On the operational aspect, derivations of the probable number of storms of a certain depth for the city has proven very useful for confirming a field trip decision ahead of the arrival of a forecasted storm.

ACS Style

Yeo Howe Lim; Abbie M. Beaudry; Nicholas Lindstrom; Ryan Hanson. Efficiency Assessments of a City’s BMP in a Cold Region. World Environmental and Water Resources Congress 2016 2016, 319 -328.

AMA Style

Yeo Howe Lim, Abbie M. Beaudry, Nicholas Lindstrom, Ryan Hanson. Efficiency Assessments of a City’s BMP in a Cold Region. World Environmental and Water Resources Congress 2016. 2016; ():319-328.

Chicago/Turabian Style

Yeo Howe Lim; Abbie M. Beaudry; Nicholas Lindstrom; Ryan Hanson. 2016. "Efficiency Assessments of a City’s BMP in a Cold Region." World Environmental and Water Resources Congress 2016 , no. : 319-328.

Conference paper
Published: 14 May 2015 in World Environmental and Water Resources Congress 2015
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ACS Style

Bahareh Shoghli; Yeo Howe Lim. Predictive Scheme for Failures of Embankment Dams with High Overtopping Potential: Case Studies Using Remote Sensing Data. World Environmental and Water Resources Congress 2015 2015, 1 .

AMA Style

Bahareh Shoghli, Yeo Howe Lim. Predictive Scheme for Failures of Embankment Dams with High Overtopping Potential: Case Studies Using Remote Sensing Data. World Environmental and Water Resources Congress 2015. 2015; ():1.

Chicago/Turabian Style

Bahareh Shoghli; Yeo Howe Lim. 2015. "Predictive Scheme for Failures of Embankment Dams with High Overtopping Potential: Case Studies Using Remote Sensing Data." World Environmental and Water Resources Congress 2015 , no. : 1.

Conference paper
Published: 14 May 2015 in World Environmental and Water Resources Congress 2015
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ACS Style

Yeo Howe Lim; Brian Mager. Model Studies of Singular and Multiple Step Rock Weirs: The Influence of Design Parameters on Scour Depths. World Environmental and Water Resources Congress 2015 2015, 1 .

AMA Style

Yeo Howe Lim, Brian Mager. Model Studies of Singular and Multiple Step Rock Weirs: The Influence of Design Parameters on Scour Depths. World Environmental and Water Resources Congress 2015. 2015; ():1.

Chicago/Turabian Style

Yeo Howe Lim; Brian Mager. 2015. "Model Studies of Singular and Multiple Step Rock Weirs: The Influence of Design Parameters on Scour Depths." World Environmental and Water Resources Congress 2015 , no. : 1.

Proceedings article
Published: 29 May 2014 in World Environmental and Water Resources Congress 2014
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The use of pervious concrete as an alternative to other urban hydrology practices is becoming more common in areas where runoff reduction is necessary in a limited amount of space. A portion of permeable pavement was introduced into a parking lot at Mallview Apartments located in Grand Forks, North Dakota. The purpose of the study was to determine the percentage of runoff reduction the permeable pavement contributes to the 17.8 ha drainage area. A comparison of the model to determine the runoff reduction for different storm intensities of 24-hour duration was carried out. Another objective was to complete field measurements of the current infiltration rates of the permeable pavement to use in the calibration of the model. The stormwater management model (SWMM) was used to run the simulations on the two models: postdevelopment with the low impact development (LID) and postdevelopment without the LID. The ASTM procedure for in-place pervious concrete infiltration rates was used to perform the field measurements. The two-year return period simulation produced a runoff reduction of 8.7%, and the average infiltration rate was found to be 43.8 cm per hour. Runoff reduction percentages decreased with increasing return period; however, infiltration percentages increased with increasing return period.

ACS Style

Abbie Beaudry; Yeo Howe Lim. Performance of Pervious Concrete on Runoff Reduction in Grand Forks, ND. World Environmental and Water Resources Congress 2014 2014, 135 -144.

AMA Style

Abbie Beaudry, Yeo Howe Lim. Performance of Pervious Concrete on Runoff Reduction in Grand Forks, ND. World Environmental and Water Resources Congress 2014. 2014; ():135-144.

Chicago/Turabian Style

Abbie Beaudry; Yeo Howe Lim. 2014. "Performance of Pervious Concrete on Runoff Reduction in Grand Forks, ND." World Environmental and Water Resources Congress 2014 , no. : 135-144.

Proceedings article
Published: 29 May 2014 in World Environmental and Water Resources Congress 2014
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In recent years projects with various designs have attempted to sever formations of rollers downstream of low-head dams. One of the popular options is by dumping some rock materials at the toe of the dam, essentially creating a rubble mound with a sloping downstream face. It is widely perceived that the permeable rubble mound can break up the roller formation. The hydraulic conveyance of the combination of a solid impermeable weir and a permeable rubble mound has been ill defined. In pursuit of greater knowledge about the specific combination design, a research project sponsored by the North Dakota State Water Commission was conducted with the aim of developing a generalized analytical tool for this type of weir, considering the loss of conveyance and modifications options. Several scaled models were constructed and tested up to the limits of available laboratory environments. It was concluded that the addition of different types of rock wedges exerted some influence on the discharge over the weir although the conveyance at upstream positions is not discernible. Experimental results indicated that the ratio of head to the rock wedge length has different influences on the Froude number at the approach. The results also show an optimal ratio of rock wedge surface length to dam height is about 1.75. As expected, the addition of a rock wedge dissipates a large amount of energy, changes the location of the jump, and calms down the jump. This study also reconfirmed the main effect of the addition of a rock wedge as the removal or the minimization of the stationary roller.

ACS Style

Yeo Howe Lim; Jeffery Fuqua. Model Studies of Semi-Permeable Rubble Mound Weirs. World Environmental and Water Resources Congress 2014 2014, 1342 -1351.

AMA Style

Yeo Howe Lim, Jeffery Fuqua. Model Studies of Semi-Permeable Rubble Mound Weirs. World Environmental and Water Resources Congress 2014. 2014; ():1342-1351.

Chicago/Turabian Style

Yeo Howe Lim; Jeffery Fuqua. 2014. "Model Studies of Semi-Permeable Rubble Mound Weirs." World Environmental and Water Resources Congress 2014 , no. : 1342-1351.

Journal article
Published: 20 November 2012 in Journal of Hydroinformatics
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One-month-ahead streamflow forecasting is important for water utilities to manage water resources such as irrigation water usage and hydropower generation. While deterministic streamflow forecasts have been utilized extensively in research and practice, ensemble streamflow forecasts and probabilistic information are gaining more attention. This study aims to examine a multivariate linear Bayesian regression approach to provide probabilistic streamflow forecasts by incorporating gridded precipitation forecasts from climate models and lagged monthly streamflow data. Principal component analysis is applied to reduce the size of the regression model. A Markov Chain Monte Carlo (MCMC) algorithm is used to sample from the posterior distribution of model parameters. The proposed approach is tested on gauge data acquired during 1961–2000 in North Carolina. Results reveal that the proposed method is a promising alternative forecasting technique and that it performs well for probabilistic streamflow forecasts.

ACS Style

Hui Wang; Brian Reich; Yeo Howe Lim. A Bayesian approach to probabilistic streamflow forecasts. Journal of Hydroinformatics 2012, 15, 381 -391.

AMA Style

Hui Wang, Brian Reich, Yeo Howe Lim. A Bayesian approach to probabilistic streamflow forecasts. Journal of Hydroinformatics. 2012; 15 (2):381-391.

Chicago/Turabian Style

Hui Wang; Brian Reich; Yeo Howe Lim. 2012. "A Bayesian approach to probabilistic streamflow forecasts." Journal of Hydroinformatics 15, no. 2: 381-391.

Journal article
Published: 01 February 2003 in Hydrological Sciences Journal
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ACS Style

Yeo Howe Lim; Leonard Melvin Lye. Regional flood estimation for ungauged basins in Sarawak, Malaysia. Hydrological Sciences Journal 2003, 48, 79 -94.

AMA Style

Yeo Howe Lim, Leonard Melvin Lye. Regional flood estimation for ungauged basins in Sarawak, Malaysia. Hydrological Sciences Journal. 2003; 48 (1):79-94.

Chicago/Turabian Style

Yeo Howe Lim; Leonard Melvin Lye. 2003. "Regional flood estimation for ungauged basins in Sarawak, Malaysia." Hydrological Sciences Journal 48, no. 1: 79-94.