Suggestions on campus waste (at least 3 items)

In March this year, 15 students from Wuhan University of Science and Technology formed an investigation team. It was discovered that the student canteen on the new campus of Wuhan University of Science and Technology throws away millions of yuan worth of food every year. "China Youth Daily" reported that investigators often heard comments such as: "I spent my own money, and it did not harm the interests of others", "Now that living standards have improved, I can just pour some food." Understand, there is no need to be so fussy", "Our country is a big agricultural country, this little food is nothing"...

Although waste on university campuses is not news, a canteen throws out food worth millions a year. , still shocking. What is even more worrying is that when faced with the fact of waste, many people do not feel ashamed but do not take it seriously.

What is more terrible than waste is indifference. Don’t waste your own money, and don’t waste it when your living standard has improved. This is basic common sense in life; "Our country is a big agricultural country, so this little food is nothing." Such rhetoric is surprising, not only because our country’s food is not There is so much that it can be wasted, and even if the food is abundant, it is not a reason to waste. The emergence of similar remarks exposes the ignorance of some students and their lack of common sense in life.

What is more terrifying than indifference is strong words. Because the food in the canteen is unpalatable, can we waste it with peace of mind? It is a fact that the food in the canteen may not always be delicious. But since you spend money to buy food, you can't waste it casually. No matter what, the money you spend to buy food is your parents' hard-earned money, right?

On the surface, blaming the canteen for wasting food seems clever and sounds high-sounding. In fact, it cannot stand up to scrutiny. There is only one reason: as long as it is wasteful, it should be despised. , should not be praised. There is no need to speak highly, nor to deliberately exaggerate the dangers of waste. It should be noted that squandering the hard-earned money given by parents for no reason is unforgivable at any time; if you find strong words to say it, it will be even more unkind.

Let the author recount an experience of the student investigation team of Wuhan University of Science and Technology. On March 18, a student investigation team came to Xinwu Village in Yangxin County, a national-level poverty-stricken county. Members of the investigation team asked 13-year-old Yin Xiaori from the village: "Tell your sister, what do you want to do when you grow up?" Yin Xiaori looked down. He raised his head and said after a moment of silence: "Chef." "Why do you want to be a chef?" "Cooking for mom." "What do you want to cook for mom?" Xiaori raised her head and looked at the person squatting in the corner in front of the stove eating. Mom said: "Fried cabbage!"

There is no need to talk endlessly about the truth. I believe that those students who waste food will be shocked after reading the above dialogue; I even believe that those students who waste food because of the canteen Students who spend a lot of money out of anger because the food tastes bad will definitely feel ashamed after reading the dialogue. Of course, if these students still care about the quality of their meals and still waste money in their own way, then I can only continue to sigh: What is more terrible than waste is indifference, and what is more terrible than indifference is arrogance!

2. According to the analysis of water use in recent years, as the population in the Taihu Lake Basin increases and people’s living standards improve, domestic water consumption will also increase. Preliminary predictions are that domestic water demand will reach 4 billion cubic meters in 2010; As for agricultural water use, due to the improvement of water conservation and the adjustment of agricultural structure, agricultural water demand will be reduced in 2010 compared with the present. The water demand in a general year is 9 billion cubic meters; the water demand for forestry, animal husbandry and fishery will remain at the current level of about 1 billion cubic meters; industry Water demand has increased compared with now, and is expected to be around 17 billion cubic meters. Taking into account the environmental water use, the total water demand in the Taihu Lake Basin is predicted to be around 33 billion cubic meters in 2010, of which high-quality water demand will be around 11.5 billion cubic meters.

3. Water resource quality

In the past two decades, with the rapid economic development in the Taihu Lake Basin and the prosperity of township enterprises, the speed of sewage treatment has far failed to keep up with the increase in sewage discharge. , a large amount of waste sewage is directly discharged into rivers and lakes without treatment, causing serious pollution to the water quality of rivers and lakes. At present, the amount of industrial and domestic wastewater directly discharged into rivers and lakes in the Taihu Lake Basin every year has reached 5 billion cubic meters. Less than 20% of this wastewater has been treated and discharged.

According to the monitoring of 82 major river and lake sections in the Taihu Lake Basin in 2000, including the main lakes in the basin, Taihu Lake and Dianshan Lake, the main water supply rivers in the basin, Taipu River and Wangyu River, and the main rivers in and out of Taihu Lake, Dongxi Tiaoxi, Nanxi, Zhihu Port, Liangxi River, Xujiang, provincial boundary rivers such as Hongqitang and Shanghaitang, etc., currently only 19.4% of the monitored sections have water quality that can still meet the surface water standard Class II or III (evaluation standard: GB3838-88), and the remaining 80.6% of the sections are subject to different The water quality of 48% of the monitored sections is Category IV, 14% is Category V, and 23% of the monitored sections are worse than Category V (this part of the water body has lost any use value).

The type of river pollution in the Taihu Lake Basin is organic pollution, and the main excessive water quality indicators are permanganate index (CODMn), ammonia nitrogen (NH3-N), etc. Lakes mainly have large amounts of nutrients (nitrogen, phosphorus and other pollutants) flowing directly into the lake, causing lake eutrophication. At present, the eutrophication problem in Tai Lake, the largest water supply source in the basin, is very serious. According to the monitoring data in 2000, 71% of the water area has reached the eutrophic level, and 29% is at the mesotrophic to eutrophic level.

(4) Main problems existing in water resources in the basin

1. Due to blind reclamation of lakes and obstacles in river channels, the regulation and storage capacity of rivers and lakes has been reduced, and drainage in the lower reaches of Taihu Lake has been poor. . After the flood in 1991, after ten years of management, the Taihu Lake Control Project has achieved remarkable results. Taihu Lake's regulation and storage capacity has been strengthened, and the downstream outlet has been basically opened up. A system of Taihu Lake regulation and storage, draining the Yangtze River in the north, the Huangpu River in the east, and Hangzhou Bay in the south has been basically formed. With the framework of the backbone engineering system for river basin flood control and water resources dispatch, the threat of floods has been alleviated to a great extent; however, judging from the flood conditions in 1991 and 1999, the planned flood control standards for the basin's defense against the 54-year type flood were relatively low, and some areas were flooded. The disaster is still serious. Still need to continue to take measures to improve flood control standards. At the same time, after treatment, the water inflow and outflow, sediment, and sewage transport in the basin have also undergone major changes, and their impact on water resource utilization also needs further study.

2. The amount of industrial and urban and rural domestic sewage is increasing year by year. Due to the extensive use of chemical fertilizers and pesticides in farmland and low treatment levels, the water quality of rivers and lakes is increasingly deteriorating, exacerbating the contradiction between water supply and demand. At present, the volume of industrial and domestic sewage in the entire basin has reached 5 billion cubic meters/year, and the pollutant discharge amount is 1.137 million tons/year in terms of CODcr. A large amount of pollutants directly enter the water body, causing serious pollution of the backbone rivers. The overall eutrophication of Taihu Lake is evaluated as eutrophication level, and blue-green algae blooms often occur in summer.

3. The local water resources in the basin are insufficient and need to be supplemented by diversion from the Yangtze River. In 2000, the Taihu Basin diverted 7.7 billion cubic meters of water from the Yangtze River. Due to severe water pollution in the river network, water diversion capacity has been affected.

4. Groundwater overexploitation is serious in some areas and ground subsidence has occurred; the northeastern part of the basin is also threatened by saltwater intrusion. According to surveys, in the past thirty years, the center of the funnel in the Su, Xi, and Chang regions of Jiangsu Province has settled by 1 meter, and the funnel area has reached more than 7,000 square kilometers; the ground subsidence in Jiaxing, Zhejiang Province has also reached 0.7 meters. Overexploitation of groundwater and land subsidence not only reduce the flood control standards of established water conservancy projects, but also reduce groundwater reserves in aquifers, worsen water quality, and may also cause saltwater erosion and reduce tidal flat resources. From the winter solstice of 1978 to the spring of 1979, the salt water of the Yangtze River estuary traveled upstream, and the salinity content in the Wusong to Minhang section of the Huangpu River exceeded the standard for 142-73 days.

5. The water resources in the river basin cannot be managed uniformly and rationally allocated. There has long been a phenomenon in various provinces and cities in the basin that "many water pipes are in charge, with unclear responsibilities", and "those in charge of water sources do not care about water supply, those in charge of water supply do not care about drainage, those in charge of drainage do not care about pollution control, and those in charge of pollution control do not care about water quality". This makes it difficult to coordinate the development, utilization, protection, and management of water resources, and it is difficult to improve the utilization level of water resources. Low water resources fees and water prices also make it difficult to correct the waste of water resources.

Serious water resources problems in the Taihu Lake Basin have greatly affected the socio-economic development of the region and become a constraint on sustainable socio-economic development.