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Written by: Lao Minyi
2020-03-13 07:00
Last updated: 2020-03-13 07:00The flowing water pond with the reputation of "Hong Kong's Little Guilin" and "Mirror of the Sky" has recently become a "dry pond" again. The bottom of the pond has dried up and cracked, leaving only a small stream to let the small fish gasp, and the sound of the flowing water is so weak that it is drowned in the human voice. in. Many hikers walked across the other side of the bank, and when they were amazed by wonders, they did not forget to "check in." Some even said "don't have a flavor."
Some scholars have questioned that the ponds are dry in a short period of time. The situation is unusual. In addition to the small amount of rain in winter, it may also be related to the activity of nearby agricultural activities. The Water Supplies Department in charge explained that the water stored in the pond was only used for irrigation by farmers, and the low rainfall and evaporation of the stored water caused the "sky mirror" to rupture.
The flowing water pond with the reputation of "Little Guilin in Hong Kong" and "Mirror of the Sky" has recently dried up again. (Photo by Li Zetong)
▼ The cracked "Mirror of the Sky" Flowing Water Pond ▼
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[Photo] Hong Kong is waiting for a crack in the bottom of a dry lake
Some citizens posted on the Facebook group "North District" recently that "flowing water is drying in the sunbath", but some netizens commented that there were still ducks swimming in the pond on March 1st, that is, "dehydration" appeared in less than 10 days Happening. Then check other people's posts in the Xingshan group earlier. At the end of last month, the pond has started to show signs of dry ponds.
Water shortage
The reporter of "Hong Kong 01" visited the site on Tuesday (10th) and did not hear the loud sound of the flowing water. I saw that the flowing water pond with an area of about 3.5 hectares was dry enough to be walkable. About half of the area became a mud flat with shoe prints on it. Some even drew a heart-shaped pattern. When a child approached, they accidentally fell in, and their hands and feet were covered with wet mud when they "escaped." Part of the pond also formed a loess with weeds. Old plastic bottles were entangled in the cracks in the stone. The remaining streams and loach formed traces of the existence of flowing water in the pond, which at first glance looked like an open-air construction site.
Citizens banned from going to the pond to "check in"
Although there is a "Don't Get Into the Water" sign beside the pond, many mountaineers saw the spectacle and walked down the pond to "check in". They couldn't help but sigh, "It used to be like a paradise, so beautiful." I was surprised that the pond was so shallow. Many parents take their children for a picnic next to the dried-up flowing water pond. Mrs. Li thinks that this scene has a special flavor. She estimates that it is caused by insufficient rain. She believes that the water in Lintang returns "naturally" in the rainy season, and her children also described it as "mud mud." Beach pond, I got my shoes tied in mud. "
The Liushuixiang Pond has dried up and cracked, and some have become loess. Some citizens walk across the bank. (Photo by Li Zetong)
There was less rainfall at the end of last year
According to the information, the dry-up phenomenon in the past ten years has occurred in early 2009, early 2015 and early 2018. Looking back the first two months of this year, the accumulated rainfall was 94.6 millimeters, about 20% more than the normal value of 79.1 millimeters during the same period, and both months were far warmer than normal. As for rainfall in the last three months of last year, except for October, which was 48% higher than normal, November was the wettest since the record in 1884, and only a small amount of rainfall was recorded. December was 50% lower than normal.
As for the water storage capacity of Liushuixiang Reservoir in the past year, the peak was 123,000 cubic meters for four consecutive months, concentrated in summer and autumn, but fell to 5,000 cubic meters last month, a difference of nearly 25 times.
The Green Garden Fund set up an organic education farm near Liushuixiang Reservoir. Due to the dry up of the pond, it can only borrow the water from another pond, but the water flow is not as great as before. (Photo by Li Zetong)
The farm is cut off from water
Liushuixiang Reservoir and Heyu Reservoir both belong to the Baxianling Country Park. It is connected by nearby mountains and rivers, and is an irrigation pond. It collects rainwater from the catchment area for irrigation in several nearby villages.
The Green Garden Fund set up an organic education farm near Liushuixiang Reservoir, which is one of the active agricultural areas. Many years ago, it was assisted by the Fisheries and Conservation Department to establish a drainage channel. It attracted irrigation water from Liushuixiang Reservoir to support nearly 50 crops of agricultural land. Director-General Liu Wanyi pointed out that the water pressure had been lowered at the end of last month, and it has recently evolved into "there is no water in the water pipes." He can only borrow water from the villagers of Heyu Village to enter the farmland. The borrowed water comes from the Heli Reservoir, and it is already "water tail" to enter the farmland. The water level flows out from ordinary household pipes. The caliber is only 4 cm. The water output is not as large as before. It failed to support the operation of the semi-automatic sprinkler irrigation system. After it can be put into a large bucket, it needs to be irrigated by hand. It is also necessary to postpone the crop planting schedule to reduce weeding, seedling and other tasks. Frankly, "there is too much manpower consumption.
Ji government digs deep water pond to store water
The flowing water pond also dried up. Liu Wanyi said that after the establishment of the irrigation pond, the government brought the landscape of the Heli Reservoir to the village's throat construction. The irrigation hose in the village has been a backup water supply plan in the past, but was “cut off” due to the construction of the house. Coping with the "Dry Pond" suffering. She believes that the silt has caused the pond to become shallower. Even if perennial crops were planted in the rainy season many years ago, the overall demand for water in the nearby agricultural land has increased significantly compared to the previous year. She hopes that the government will consider re-digging deep ponds for water storage.
However, Wu Shiliang, an associate professor of the Department of Geography and Management Resources of CUHK, pointed out that the bottom of the pond is uneven, and the structure under the silt may be very complicated. It can be handled simply by a dredge. It is believed that if the pond is not fully maintained for a long time, Are meaningless. " The Water Supplies Department pointed out that the outlet pipe of a pond is generally higher than the bottom of the pond to prevent the outlet pipe from being easily clogged, and the bottom of the flowing water pond is still lower than the outlet pipe. Therefore, it is considered that clearing mud and digging deep ponds will not increase the supply of ponds. Water storage for irrigation. The AFCD stated that it had not received any requests for assistance regarding the lack of irrigation water and would provide assistance to farmers if necessary.
The trees around the flowing water pond are shaded by trees, but there is only a small amount of water left in the pond. (Photo by Li Zetong)
Scholars say insufficient rain is not the only culprit
The Heyu Reservoir still has water flowing into the village, but the Liushui Reservoir across the mountain has dried up and cracked. Zhan Zhiyong, a former professor of the Department of Geography at the University of Hong Kong University, said that “before, it was beautiful, and the situation of the family was very shocking.” He also said that the trees around the catchment area were growing well. Even after the dry season, they should have sufficient water storage capacity. "Dry fast", we need to assess whether the activity of the nearby farmland and its crops ’demand for water has suddenly increased; some of them are related to the lack of rain, and it should be more than one pond.
During the inspection, the reporter encountered dragonflies, butterflies and waterfowls in the flowing water pond. Cheng Shizhang, director of the Center for Ecological Education and Resources, said that the pond was originally a stable large body of water and provided sufficient water for animals and plants. If it dries up or evolves into forest land for a long time, the water level will rise and fall, and unstable water sources can make native aquatic animals disappear. But it may also make waterbirds easy to find food, so it is difficult to comment across the board whether it is good or bad.
Hou Zhiheng, chief lecturer of the University of Hong Kong Biological Sciences, said that there are fish in the pond itself. Even dry ponds can survive in soft mud for a period of time or swim into streams, but there is no water or the dragonfly larvae die and affect the adults. He said that two weeks ago, the inspection was still full of water, and "the water will suddenly evaporate and the water will increase", or it may be related to the increase of agricultural water use or the release of water by the Water Supplies Department.
WSD states dry ponds due to low rainfall in winter and evaporation of stored water
The Water Supplies Department explained that after collecting rainwater from the catchment area, the Liushuixiang Reservoir provided water to farmers for irrigation through water conservancy facilities set up by the AFCD. The water was stored for no other purpose. The Department believes that due to the small amount of rain in the past winter, the previously collected rainwater stock has been supplied to farmers for irrigation, and the evaporation of the stored water has caused the flowing water pond to dry up recently.
▼ Beautiful scenery of flowing water ponds ▼
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