Recently, Shanghai has the earliest summer in history of 40 ° C high temperature days, with the rise in temperature, green ping, water hyacinth and other aquatic plants into the growth period, piece by piece floating on the river surface, the river and lake water environment has caused a lot of impact. In the past few days, the river cleaning staff in the suburbs of Shanghai is braving the high temperature to carry out the salvage of aquatic weeds and duckweed to protect the clear waves of clear water.
"Old horse, fish a little over here, and we'll get rid of this piece of water hyacinth." Early in the morning, on the wide river surface of Wangliangpu Port in Fengjing Town, two cleaners in orange and yellow life jackets were already busy. The driver, Hu Xianggen, drove the cleaning boat steadily, and drove wherever there was a floating water hyacinth. The cleaners Ma Juping and Cheng Xuelin held long iron rakes for a while on both sides of the station ship, and stood on the side for a while to cooperate with tacit understanding. Although the sun had just climbed up into the sky, after a busy time, his body was soaked with sweat.
"Since this time, the water hyacinth has slowly increased, and we have to salvage at least four or five boats a day. You don't see that there are not many floating on the river now, but this thing grows very fast, and if the wind direction is not good, the upstream will float here. This is still a waterway, and there can be no net interception, so it can only be cleaned up by us in time. In order to keep the water surface in the jurisdiction clean, Ma Juping and his colleagues have to use a combination of manual and mechanical methods to clean up the river every day these days.
It is reported that the water hyacinth is commonly known as the water lotus, and the scientific name is the hyacinth. As the fastest growing and multiplying aquatic plant in the world, a water hyacinth can grow in 1 times the growth area within 6 days and can reproduce into a group of 600,000 plants in 8 months. Because it is an alien species, there are no natural enemies in the country, which makes it more able to grow unrestricted. Jinshan District, where Fengjing Town is located, is located in the southwest of Shanghai, and is responsible for 60% of the city's green ping and water hyacinth salvage every year. As an upstream, it borders Pinghu lake, Jiashan and other places in Zhejiang, and the cleaning of water hyacinth can be described as "the first to bear the brunt".
"In several 'corners' of the river's confluence, water hyacinths are piled up and are the areas where we focus on salvage." The old horse said. Salvaging aquatic weeds looks easy, but it's actually a technical job. Water surface cleaning has seasonal characteristics, now is the outbreak period of water hyacinth, can use the reservoir area for centralized salvage, and so on in November when the day is cold, it will begin to mainly salvage its stumps, and after the spring, there will be relatively more garbage and floating matter on the water surface.
At about 9.30 a.m., the salvage vessel returned to the dock and the two mesh bag water hyacinths carried ashore with the help of a crane. Lao Ma said: "After exposing and rotting, these water garbage will be loaded on ships and sent to the pointing place for centralized treatment." It is reported that in the second half of 2019, with the signing of the "Memorandum of Understanding on the Integration of Water Environment Cleaning in the Junction Area of Jinshan District of Shanghai, Pinghu City of Zhejiang Province, and Jiashan County of Zhejiang Province", under the joint efforts of the three parties, the first line of defense for the interception of aquatic plants in southwest Shanghai has become tighter and tighter. Lao Ma introduced: "In the past two years, the water hyacinth floating upstream has been significantly less, which has reduced a lot of pressure on our work. ”
The high temperature came early, in order to curb the growth rate of aquatic grass, Lao Ma's colleagues have been fighting on the front line these days. In order to guard the clear water, the unit responsible for the cleaning of the town's river also set up an emergency rectification team at the first time to conduct a comprehensive inspection of the rivers under its jurisdiction, and listed the rivers such as the Rehe River, Maoli Port, and Hengjing Port as the key rectification rivers, with a total rectification length of more than 20 kilometers.
Author: Bo Xiaobo Yu Xiang
Editor: Zhang Yi