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On 1 april, our country entered the country officially, and this year's season was marked by gradual regional droughts and floods, which were heavy and possibly repeated in the northern region。
The water sector analyses and evaluates the situation and current rainfall, arranges for the deployment of water and drought disaster defence priorities and makes every effort to ensure flood and water safety。
Since 1 april, our country has officially entered its deadline. The south is about to witness the first wave of heavy rainfall this year。
From 2 to 4 april, there will be a heavy rainfall process in the main part of gangnam, the north-eastern part of south-eastern china and the south-western part of the country. The hunan gang and its tributaries will navigate the yang river, and rivers such as the west gang, the kibaki river, the shin river and the upper zhejiang chan tong river will experience water surges。
The ministry has been in a state of operation since 1 april and has activated 24-hour guard duty. The provinces concerned in the south are in a state of prevention and are taking active action in order to respond in advance。
This year, our region was marked by gradual drought and flooding
Long embankments, grass and onions on the green track. On 31 march, the first phase of the integrated rehabilitation and upgrading of the 100-mile chan tong in the city of heining, zhejiang, was officially opened to the public after almost five years of closed renovation。
“according to the upgrading of the works, further secure lines will be constructed on the northern shore of the chandong river.” according to zhejiang heining, the chief engineer of the water authority, zhejiang, zhejiang city, the height of the embankment was raised from 10. 6 to 11. 2 metres and the defence capacity was further upgraded. “at the same time, the project was to simultaneously re-establish the ponds' flood gates and the western gates, further defusing the drainage channels and securing the area's flood safety barrier.”
This year's entry date coincides with the years of average entry date. How do we set the entry date
The second-level researcher from the technical information service of the water and drought department of the ministry of water and water services, who described the date of entry as having to take into account both heavy rainfall and flooding, corresponding to both rainfall and water level indicators, “from 1 march onward, the area covered by the cumulative rainfall of more than 50 mm per year will be 150,000 square kilometres, or any of the representative stations will exceed the alert level to meet any one of the targets, which may be determined as the date of entry. When the date is later than 1 april, the entry date for the year shall be 1 april.”
At the end of march, the forecaster of the ministry of water and water information centre presented a strong rainfall process in many places, including guangdong and guangxi, with a cumulative rainfall of over 50 mm covering an area of 154,000 square kilometres over three consecutive days, meeting the rainfall target and setting 1 april as the date for entry into the country for this year。
How's the mood this year
This year's season was marked by regional and phased droughts and floods, which may be repeated in the northern part of the country, as well as extreme heavy rains and possibly typhoons affecting the interior。
Focused on priority areas and precision of the panels. Flood protection works are the first line of defence against floods。
“in the case of flood prevention projects `three components', reservoirs, river lanes and embankments, and flood holding areas are inevitably damaged in the face of floods. To seize the limited amount of time before the arrival of the flood, to strengthen the dam, silt the river lanes, free up the reservoirs, advance the restoration of the water-deficit water facilities and ensure that flood-proofing works are carried out to strengthen the `physical' promotive period.” according to rosson, head of the security department of the department of water and drought defense of the ministry of water and water, 2355 priority water destruction rehabilitation projects have been rehabilitated, representing a rate of 55. 5 per cent, in 4,422 projects nationwide。
New technologies enable hydrological monitoring to make defense decisions more efficient
The embankments are wide, and the rivers are still flowing. The long-conductor project under the horse in the zhengzhou of yellow river, like a “rock” of coconut shells, is hidden in water。
A small “rock”, like the “neuros” of the yellow river, sense the dynamics and gather information. "chips and multi-dimensional sensors have been installed in the `rocks', which are waterproof, resistant, long-duration, sensitive to the loss and diversion of root stones and monitor accuracy up to a cm level." presentation by li chi peng, deputy chief, engineering section, yellow river authority, henan river authority。
The root stone is the foundation of the yellow river flood-proofing project. “the southern part of the yellow river is a drifting channel, which is vastly shallow, complex and dangerously hidden underwater. It's hard to find it early once the stone is broken." li said。
New technologies protect the yellow river. The team li ji peng was working continuously to overcome technical difficulties such as underwater electromagnetic signal transmission, equipment renewal, waterproofing of the outer shell, and to upgrade the "smart stone" iterative. “this year, 2232 “smart stones” were placed in yellow river insurance, control engineering, all-weather sensor monitoring, early warning, and staff knew where the danger was, and the efficiency of the survey was greatly improved.” li said。
The “smart stones” in the water, the satellite remote sensing in the sky, video surveillance on the ground, and the continuous collection of information, as well as the integrated monitoring and perception network of the “sky waterworker”, are being woven, gradually upgrading the digital intelligence of the yellow river in all directions, chain and field。
The “three yellow rivers” are synergized to make anti-silver decision-making more efficient. A presentation by the officer-in-charge of the yellow river water commission, model yellow river simulation of floods, pre-judgement; precision calculations of the digital twin yellow river, multiple large model optimization programmes; field validation of the prototype yellow river, dynamic follow-up observations by researchers, and support for the three yellow rivers, which provide a powerful impetus to anti-silver efforts。
Scientific defence. Data is the basis. New technologies enable hydrological monitoring to “run” information before floods。
Not long ago, the whitestone hydrological station in zhejiang li shui city was completed. Equipment such as the automatic flow detection system of the cable channel and the ar (relevance of reality) scene intelligence monitoring system are co-operating and serve as a forward “poster” for rainwater collection。
According to the concerned director of the water department of zhejiang province, the expected increase in extreme rainfall flooding in the zhejiang river this year is an increase in the requirement for accuracy of rainfall forecasting. At present, the entire province of zhejiang has basically built an early warning system for monitoring and forecasting floods from the source areas, small and medium-sized rivers, dry-flow floods, to the estuary floods, which provides the basis for decision-making in the prevention of haze。
The construction of a digital river is accelerating, with the construction of “three lines” for rainwater monitoring forecasting, and the completion of the construction of a flood-proofing, early warning, preview and pre-emptive capability of the shibuya river. Thirty-four operational scenario models with the characteristics of the pearl river basin have been applied, allowing for precision forecasting of rainfall, high-precision simulation of storm surges, fine water reservoirs, etc。
Strengthen the coordination of administrative, technical and inspection staff in the area of security management responsibility
In the early hours of the day, tan weng-ryung, head of the management unit of the bilong lake reservoir in gyeongyun county, shandong, conducted a water reservoir survey. “the waters of the north-west, with white floats, need to be handled by personnel.” tam wen zheng said。
“in the past, it will take an hour and a half to patrol by leg and eyes. With a drone waiting for help, it can be done in 15 minutes。
The bilong lake reservoir, located on the right bank of the tehui new river, is one of the major flashpoints in the upper river basin. The director-general of the water department of kyung yun county, zhang zhongtao, is responsible for the security of the reservoirs in the districts and is fully upgrading the reservoir digital information platform. Ai video recognition engineering risk, real-time viewing of handset mobile phone software to achieve human protection。
Water reservoirs are an important infrastructure for regulating river run-off and are also the focus of anti-fouling efforts。
There are currently some 95,000 reservoir dams with a total capacity of over 1 trillion cubic metres. In recent years, extreme weather events have increased the severity and complexity of the risk safety situation in reservoirs。
In response to the large number of small reservoirs and the decentralized nature of their management, the ministry of water and water resources has implemented a system of security management responsibilities involving 170,000 people in the field of defence, technology and patrolling of the “three duty-bearers”; during the “145” period, it focused on the consolidation of 17,998 health and risk reservoirs and the timely elimination of security risks。
According to the relevant head of the ministry of water, ensuring the safety of reservoirs requires people to manage and manage them, the water sector has accelerated the construction of a modern reservoir operating management matrix, and 48,000 small reservoirs, which are decentralized by townships, have adopted regional centralized care and specialized care models such as government purchasing services。
Drought preparedness cannot be ignored. The mid-downstream of the yangtze river and the northern part of xinjiang are projected to be subject to phased drought. The relevant head of the ministry of water indicated that drought monitoring forecasts should be strengthened by precise range, precise target, precise timing and precision measures, by guiding the roll-out of the drought zone in the conduct of supply and demand water balance analyses, the implementation of water engineering and drought control and emergency water management, and by all means ensuring water security。
Daily people's journal (ed. 14 of 03/04/2000)
