Inland Waterway Engineering and Management

Vocabulary flashcards covering inland waterway transport, navigation channel design, river training works (groynes, dams, revetments), hydraulic loads, ship locks, and infrastructure management based on lecture exam questions.

Inland Water Transport

A transportation mode occurring on rivers, lakes, and canals, characterized by the ability to carry oversized and super-heavy cargo and promote the circulation of goods.

Navigation Channel (Luồng tàu)

A designated water area limited by a signaling system designed for vessel traffic, characterized by parameters such as width, depth, and radius of curvature.

Water Flow Rate ($Q$)

The volume of water passing through a specific cross-section of a channel per unit of time.

Ship Draft ($T_t$)

The vertical distance from the water surface to the lowest part of the ship's hull (the bottom of the ship).

Design Navigation Depth ($H_l$)

The required depth of a channel determined by the formula H_l = T_t + \text{\Delta} T, where $T_t$ is the ship draft and \text{\Delta} T is the safety margin.

Required Visibility (Tầm nhìn)

The minimum distance required for vessel safety, usually taken as at least 5 times the length of the ship ($5 L_t$).

Radius of Curvature (Bán kính cong)

A characteristic of the navigation channel usually determined as $5-6$ times the ship length ($5-6 L_t$) to allow safe turning.

Cross-section Ratio ($A_c/A_s$)

A factor used in channel design where a ratio of $\geq 7$ is typically applied for two-way navigation channels.

Design Low Water Level

The water level corresponding to a specific frequency, usually taken at $95-98\%$ for inland waterway design.

Maximum Allowable Lateral Velocity

The maximum permissible flow velocity perpendicular to the channel axis, typically constrained to $0.3-0.4\,m/s$.

River Training Line (Tuyến chỉnh trị)

The new alignment of a river channel during the low water season (mùa kiệt), limited by river training works to stabilize the flow and ensure ship passage.

Training Line Width ($B_t$)

The width of the regulated channel determined based on the design water level and methods such as morphology, hydraulics-morphology, or statistics.

Stability Axis (Trực động lực)

The dynamic axis of the water flow that river training lines should ideally follow to maintain stability.

Permanent Load (Tải trọng thường xuyên)

Loads that act continuously throughout the lifespan of the structure, such as the self-weight of the structure or long-term earth pressure.

Special Load (Tải trọng đặc biệt)

Loads that occur under exceptional circumstances, such as earthquakes, extreme floods, or design-level storm waves.

Hydrostatic Pressure

The pressure exerted by a liquid on a structure when the liquid is in a static (stationary) state.

First Limit State

A design condition used to check the strength, overall stability, and maximum load-bearing capacity of a structure.

Second Limit State

A design condition related to serviceability, including local durability, displacement, deformation, and the formation or expansion of cracks.

Groyne / Spur Dike (Kè mỏ hàn)

A structure connected to the riverbank used to narrow the riverbed, protect the bank, and change the position of the dynamic axis of the flow.

Closing Dam (Đập khóa)

A cross-river structure built in secondary branches or creeks to divert all or most of the flow into the desired main channel.

Longitudinal Dike / Training Wall (Kè hướng dòng)

A structure designed to maintain or redirect the flow direction, concentrating the current in the navigation channel.

Revetment (Kè ốp bờ)

A defensive, passive structure used to protect riverbanks or coastlines directly from erosion caused by currents and waves.

Toe Protection (Chân khay)

The lower part of a revetment intended to stabilize the surface reinforcement layer and prevent bottom scouring.

Gabion (Rồng, rọ đá)

Wire mesh containers filled with stones used as flexible elements in river training works.

Geotextile (Vải địa kỹ thuật)

A material used as a coating or support layer in hydraulic structures to protect and stabilize the surface.

Ship Lock (Âu tàu)

A structure used to move vessels between two bodies of water that have different water levels, classified as single-stage or multi-stage.

Design Fleet (Đoàn tàu tính toán)

A specific set of ship dimensions and configurations used as the basis for designing lock dimensions and channel parameters.

Inland Waterway Infrastructure

The physical components including navigation channels, ship locks, ports, wharves, and signaling systems.

Maintenance (Bảo trì)

Operations carried out according to an approved plan to maintain operational capacity, extend the structure's lifespan, and ensure safety.

As-built Records (Hồ sơ hoàn công)

Detailed documentation of the completed project's dimensions and coordinates, essential for future repairs, upgrades, and risk management.