The middle and lower reaches of the Yangtze River entered Meiyu in an all-round way, and 10 provinces and regions started the four-level flood control response! Sand and gravel production and transpor

As a bulk solid construction material, the high logistics cost of

sand and gravel aggregate is one of the important factors restricting its market expansion. Water transportation can greatly reduce the transportation cost of sand and gravel aggregates, break the geographical restrictions of sand and gravel aggregates, and master logistics is undoubtedly the lifeline of transportation.

The Yangtze River Basin, including the main stream and tributaries of the Yangtze River, spans the three major economic zones of eastern, central and western China, with a total of 19 provinces, municipalities and autonomous regions. It is the third largest basin in the world and is rich in natural resources. The navigation mileage of the Yangtze River trunk line is 2713 km, with more than 700 tributary waterways, more than 50 main tributaries and numerous ports.

In recent years, the number of large-scale sand and gravel projects along the Yangtze River has increased year by year, and the Yangtze River Basin has gathered a large number of new production lines with its superior geographical advantages. Relying on the convenient waterway transportation, the sand and gravel enterprises along the Yangtze River have played a rapid role, but the waterway transportation inevitably has the situation of flood season and river dry season.

launched a Level-IV emergency response for flood prevention in 10 provinces and regions, including Jiangsu, Zhejiang, Anhui, Fujian, Jiangxi, Hubei, Hunan, Guangxi, Guizhou and Yunnan, in accordance with relevant working procedures.". According to the forecast, from June 20 to 25, under the combined influence of cold and warm air, there will be a heavy rainfall process in the eastern and southern parts of Southwest China, the south of the Yangtze River, the western and northern parts of South China and the southeastern part of Hubei. Affected by it, the Poyang Lake and Dongting Lake water systems in the Yangtze River Basin, the Liujiang River and Guijiang River in the Pearl River Basin, the Taihu River network area, the Qiantang River in Zhejiang and Fujian, the Futunxi River in the upper reaches of the Minjiang River and other major rivers may have floods exceeding the warning level, and some small and medium-sized rivers in the rainstorm area may have larger floods.

The Yangtze River Navigation Bureau held a flood control work deployment meeting in 2023, which pointed out that at present, the Yangtze River trunk line will enter the flood season. The climate of the Yangtze River Basin in the flood season this year is generally poor, with drought heavier than flood; the precipitation in the main flood season is less, with 10 to 20% more in the northern upper reaches of the Yangtze River and the Dongting Lake and Poyang Lake basins, 10 to 30% less in most other areas, and 20 to 30% less in the middle reaches of the Yangtze River. The upper reaches of the Yangtze River and the southern part of Dongting Lake and Poyang Lake are facing regional flood risk, while the middle and lower reaches of the Yangtze River and the areas north of them are prone to drought. In addition, six to eight typhoons are expected to land this year, and the first landing time is earlier than usual. The shipping safety of the Yangtze River is likely to face the "double-front battle" situation of flood control and typhoon prevention.

According to the forecast of Jiangxi Meteorological Observatory, Jiangxi Province will enter the precipitation concentration period for seven consecutive days in the coming week, with heavy rain and heavy rain, accompanied by thunderstorms and gales in some areas.

According to the statistics of China Sandstone Association, the price of sand and gravel in some ports of the Yangtze River in May is lower than that in April. At present, many places along the Yangtze River are in flood season, and the transportation of sand and gravel may be affected to a certain extent. In addition, due to rainfall, the production efficiency of some enterprises using dry sand production process will be reduced. Risks and Preventive Measures

for Navigation in

Flood Season Risks

to Navigation Safety in Flood Season 1.2. 12.3.4

.

Preventive measures

in flood season

Make good preparations before sailing. Strengthen the daily inspection and maintenance of the ship's main and auxiliary engine, rudder system, emergency system equipment and facilities. Strictly carry out self-inspection before sailing, and inspect navigation, communication, lifesaving, windlass and other equipment to ensure that the ship is in a safe and seaworthy state. Equipped with qualified and competent crew members to avoid fatigue driving caused by insufficient on-duty personnel. The cargo loaded on the ship shall be reasonably stowed and overloading shall be avoided.

Regulate navigation behavior. During navigation, attention should be paid to floating objects on the river surface to prevent accidents such as ship machine failure and ship out of control. The ship shall sail at a safe speed. When sailing through the wharf, anchorage, special channel, fork estuary and other waters, the speed of the ship shall be controlled, the lookout shall be strengthened, the ship shall be driven carefully, and the surrounding ships shall be noticed. Fully consider the impact of the hydrological characteristics of the curved and Rapids sections on ship maneuvering, control the ship's position and speed as early as possible, and pass cautiously. When a ship passes through a water area with a large angle between the current velocity and the channel, it shall be driven carefully to avoid the occurrence of ship inversion; when overtaking another ship, it shall keep a sufficient horizontal distance from the overtaken ship to prevent the occurrence of ship suction; during the navigation, it is strictly prohibited to drift, exceed the speed limit, and sail near the edge. Proce

ed with caution through the waters of the bridge area. When passing through the waters of the bridge area, according to the maneuverability of the ship, the clearance height of the bridge, the width of the channel, the influence of the navigation environment factors such as the flow in flood season should be fully considered, the influence of the flow on the operability of the ship should be estimated in advance, and whether the ship meets the maximum allowable height of the bridge and other river-crossing buildings to be passed should be carefully verified. Implement the bridge anti-collision preventive measure. If safe passage cannot be guaranteed, it should be prohibited to pass, anchor or bypass in safe waters, and avoid risky navigation.

Do a good job of anchoring watch. During the berthing of the ship, sufficient crew members on duty shall be reserved according to the regulations. Reasonable anchoring methods shall be adopted according to the ship's dimensions, cargo loading and the hydrogeological conditions of the anchoring waters. The anchor chain shall be loosened and sufficient surplus water depth shall be reserved to keep a safe anchoring distance from other ships. It is strictly prohibited to anchor near the river-crossing cable and the waters of the bridge area, so as to prevent accidents caused by cable breakage or anchor dragging. Display the anchoring signal as required during anchoring, strengthen the anchoring watch, frequently measure the anchor position, keep high-frequency listening, keep the AIS equipment open normally, timely clean up the floating objects with the water to prevent excessive accumulation and break the cable or anchor chain, pay attention to the stress of the anchor chain and the change of the distance between the ship and the surrounding anchoring ships, and prevent the occurrence of dangerous situations such as anchor dragging.

Standardize berthing and unberthing and operation behavior. In the process of berthing and unberthing, the ship berthing and unberthing shall fully consider the possible impact of current pressure on the ship, and if necessary, the tugboat shall be asked for assistance to avoid contact accidents. During the loading and unloading operation at the wharf, the loading requirements of the ship's cargo shall be strictly implemented. The cargo shall be bound firmly to prevent displacement, and shall not be overweight, super-high or super-wide. During berthing at the wharf, pay attention to the change of tide, adjust the length of the cable in time, and fasten the cable when necessary.

Effectively implement the main responsibility. Shipping enterprises and ship management companies should strengthen the implementation of the main responsibility of safety production and urge ships to implement various safety measures. Carefully manage key equipment and ships, and provide sufficient and effective technical guidance and shore-based support for ships.

Regulate surface and underwater activities. Each surface and underwater construction unit shall evacuate and reinforce the wading construction equipment and equipment in advance to prevent the construction platform from drifting with the water after being submerged and endangering the safety of ships and bridges.

Standardize the operation of passenger and steam ferry. Ferry operators should strictly implement the responsibility of safety management, strengthen the management of ferry order, and strictly prohibit overloading passengers. Ferries should pay close attention to weather changes, strictly abide by safe navigation regulations, reduce passenger capacity when necessary, and prohibit risky navigation.