Please use this identifier to cite or link to this item:
https://hdl.handle.net/11681/43000Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Kruse, C. James. | - |
| dc.contributor.author | Kang, Dong Hun, 1965- | - |
| dc.contributor.author | Mitchell, Kenneth Ned. | - |
| dc.contributor.author | DiJoseph, Patricia K. | - |
| dc.contributor.author | Kress, Marin M. | - |
| dc.date.accessioned | 2022-01-24T18:15:35Z | - |
| dc.date.available | 2022-01-24T18:15:35Z | - |
| dc.date.issued | 2022-01 | - |
| dc.identifier.govdoc | ERDC/CHL TR-22-1 | - |
| dc.identifier.uri | https://hdl.handle.net/11681/43000 | - |
| dc.identifier.uri | http://dx.doi.org/10.21079/11681/43000 | - |
| dc.description | Technical Report | en_US |
| dc.description.abstract | The United States Army Corps of Engineers is tasked with maintaining waterborne transportation system elements. Understanding channel utilization by vessels informs decisions regarding operations, maintenance, and investments in those elements. Historically, investment decisions have been informed by safety, environmental considerations, and projected economic benefits of alleviating channel restrictions or shipping delays (usually derived from models). However, quantifying causes and impacts of shipping delays based on actual historical vessel location data and then identifying which causes could be ameliorated through investment has been out of reach until recently. In this study, Automatic Identification System vessel position reports were used to develop quantitative measures of transit and dwell-time reliabilities for commercial vessels calling at the Port of Baltimore, Maryland. This port has two deep-water approaches: Chesapeake Bay and the Chesapeake and Delaware Canal. Descriptive metrics were determined for each approach, including port cycle time, harbor stay hours, travel time inbound, and travel time outbound. Then, additional performance measures were calculated: baseline travel time, travel time index, and planning time index. The key finding of this study is that the majority of variability in port cycle time is due to the variability in harbor stay hours, not from channel conditions or channel restrictions. | en_US |
| dc.description.sponsorship | Navigation Systems Research Program (U.S.) | en_US |
| dc.description.tableofcontents | Abstract ................................................................................................................................................... ii Contents ................................................................................................................................................. iii Figures and Tables .................................................................................................................................. v Preface ................................................................................................................................................... vii 1 Introduction ..................................................................................................................................... 1 1.1 Background: Port area performance measurement ..................................................... 1 1.2 Objective: Quantifying navigation channel utilization ................................................... 3 1.3 Approach ......................................................................................................................... 3 2 Method ............................................................................................................................................ 5 2.1 Automatic Identification System (AIS) data ................................................................... 5 2.2 Port area analysis boundary .......................................................................................... 6 2.3 AIS data preparation ....................................................................................................... 8 2.4 Input metric definition .................................................................................................. 10 2.4.1 Port Cycle Time (PCT) .................................................................................................... 10 2.4.2 Harbor Stay Hours (HSH) .............................................................................................. 11 2.4.3 Travel Time Inbound (TTIB) ........................................................................................... 12 2.4.4 Travel Time Outbound (TTOB) ....................................................................................... 13 3 Results ........................................................................................................................................... 15 3.1 Overall sample count analysis ..................................................................................... 15 3.1.1 Trip sample count by route ........................................................................................... 15 3.1.2 Daily patterns of vessel arrival time ............................................................................. 15 3.2 Overall travel time analysis .......................................................................................... 16 3.3 Overall performance measure results ......................................................................... 18 3.3.1 Performance measures developed .............................................................................. 18 3.3.2 Percentiles used for mobility measures ....................................................................... 19 3.3.3 Overall analysis results ................................................................................................. 19 3.4 Vessel type analysis results ......................................................................................... 20 3.5 Vessel size analysis ...................................................................................................... 27 3.6 C&D canal analysis – effect of pilot restrictions ......................................................... 30 3.6.1 Case 1: Some outbound trips are blocked by wide inbound vessels ......................... 31 3.6.2 Case 2: Canal is freed when inbound vessel exits the canal. ..................................... 33 3.6.3 Case 3: Inbound trips are blocked by wide outbound vessels. .................................. 34 3.6.4 Case 4: Canal is freed when outbound vessel exits the canal. .................................. 36 4 Conclusions and Recommendations ......................................................................................... 38 4.1 Conclusions ................................................................................................................... 38 4.2 Recommendations ........................................................................................................ 39 References ............................................................................................................................................ 41 Appendix A: Arrival Count Plot by Hour by Day of Week .................................................................. 45 Appendix B: Complete Calculations Results for Output Measures ............................................... 46 Appendix C: Director’s Letter ............................................................................................................. 58 Unit Conversion Factors ...................................................................................................................... 59 Acronyms and Abbreviations .............................................................................................................. 60 Report Documentation Page | - |
| dc.format.extent | 70 pages / 5.88 MB | - |
| dc.format.medium | - | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Coastal and Hydraulics Laboratory (U.S.) | en_US |
| dc.publisher | Engineer Research and Development Center (U.S.) | - |
| dc.relation.ispartofseries | Technical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/CHL TR-22-1 | - |
| dc.rights | Approved for Public Release; Distribution is Unlimited | - |
| dc.source | This Digital Resource was created in Microsoft Word and Adobe Acrobat | - |
| dc.subject | Baltimore (Md.)--Harbors--Evaluation | en_US |
| dc.subject | Inland navigation--Evaluation | en_US |
| dc.subject | Shipping | en_US |
| dc.subject | Ships--Automatic identification systems | en_US |
| dc.subject | Waterways--Evaluation | en_US |
| dc.title | Freight fluidity for the Port of Baltimore : vessel approach and maritime mobility metrics | en_US |
| dc.type | Report | en_US |
| Appears in Collections: | Technical Report | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ERDC-CHL TR-22-1.pdf | 5.88 MB | Adobe PDF |  View/Open |