On June 3, Changhua, Yunlin and Chiayi counties and Greater Tainan were hit by a series of thunderstorms. Most streets in Chiayi City are supplied by the high-lying Lantan Reservoir (蘭潭水庫) on the east side of the city toward lower areas on the west side. Given that Chiayi is built on hilly land about 100m above sea level and considering its geological composition of red soil and gravel beds, it is not an area in which floods should easily occur.
The main cause of the floods is connected to the rising property prices over the past decade. Before development, most of the land was hilly terrain that effectively drained and held back floods. The hinterland around Chiayi Park and the Chiayi Botanical Garden performed a similar function. However, almost all of these hills have been developed into luxury homes and non-agricultural village estates for the rich. These commercial developments are paved with impermeable surfaces.
Consequently, even Chiayi University’s Lantan campus is awash with mud. When rain fell on Fenci Lake (奮起湖) and the upper reaches of the Bajhang River (八掌溪) 20 years ago, it took about eight hours to reach the south side of Chiayi City 40km away. Now it takes little more than two hours to arrive.
A policy should be adopted of redefining and rescaling the drainage of urban areas that lie in the path of rivers throughout Taiwan, and checking if the drainage areas are sufficient. This could be the basis for adjusting national land planning and the division of administrative districts.
Global sea surface temperatures have been rising about twice as fast since the 1970s. With this in mind, drainage and flood control channels should be planned according to rainfall figures for the past 20 years and projecting the scale of floods in the next 50 or 100 years, rather than relying on statistical data from the past 100 years. We have recently experienced a succession of rainstorms that have repeatedly broken records.
Stormwater retention and drainage systems for densely populated areas and large and influential public construction projects in downstream areas should be improved, expanded and made more effective, section by section and year by year. As for upstream mountainous areas, they should be properly regulated to stop the cycle of commercial development and accompanying public works.
These measures would reduce the risk of landslides and floods following heavy rainfall. They would also prevent the constant menace of pollutants such as pesticides and fertilizer, not to mention excrement, running into reservoirs where they are stored up and supplied as toxic drinking water to people living downstream.
In places where flood prevention and drainage systems have been insufficient to handle the torrential rainstorms of past decades, it may be necessary to employ rigid enforcement measures to limit the intensity of land use in urban areas, cutting the amount of artificial surfacing used so as to make land more permeable. Building more flow barriers between sections and areas upstream would also be an effective short term measure.
The documentary Beyond Beauty: Taiwan From Above (看見台灣) has made many people more aware of the dangers to our environment. This awareness must be turned into action to prevent floods, improve the quality of drinking water, break the cycle of disasters in mountainous areas and stop the waste caused by the mistaken allocation of resources. The starting point is national land planning, waterway and drainage basin management, and controlling the development and use of the nation’s land and rivers.
Lai Ming-huang is a former director-general of the tourism bureaus of Chiayi City and the former Tainan County.
Translated by Julian Clegg
China has started to call Tibet “Xizang” instead of Tibet for several reasons. First, China wants to assert its sovereignty and legitimacy over Tibet, which it claims as an integral part of its territory and history. China argues that the term Xizang, which means “western Tsang” in Chinese, reflects the historical and administrative reality of the region, which was divided into U-Tsang, Amdo and Kham by the Tibetans themselves. China also contends that the term Tibet, which derives from the Mongolian word Tubet, is a foreign imposition that does not represent the diversity and complexity of the region. Second, China wants to
The Chinese Nationalist Party (KMT) and the Taiwan People’s Party (TPP) had engaged in weeks of political horse-trading between high-ranking officials, hoping to form a joint ticket to win January’s presidential election, but it all ended in a dramatic public falling out on live television on Thursday. The farcical performance involving mudslinging and quarrels among three men — the TPP’s candidate and Chairman Ko Wen-je (柯文哲), the KMT’s candidate, New Taipei City Mayor Hou You-yi (侯友宜), and Hon Hai Precision Industry Co founder Terry Gou (郭台銘), an independent — and their aides in the evening before the official candidate registration deadline
Due in large part to the US-China trade war, Taiwanese supply chains continue to relocate from China and some manufacturers have increased the rate at which they have invested in Mexico to align their operations with the needs of customers and to comply with US policy. However, setting up manufacturing plants in Mexico is not without its complications, including the language barrier, different cultures, local regulations and finding qualified staff. Accumulating talent with proficiency in Spanish is the first step to developing the market in Mexico, and indeed Latin America as a whole. WHY MEXICO Mexico is a good location for three
Hon Hai Precision Industry Co founder Terry Gou (郭台銘) might be accused of twice breaking his promises and betraying the Chinese Nationalist Party (KMT), then launching a signature drive for himself to stand as a candidate in January’s presidential election, only to turn around and quit the race. It clearly shows that rich people are free to do as they like. If that is so, then Taiwan People’s Party (TPP) Chairman and presidential candidate Ko Wen-je (柯文哲) is the perfect example of a political hack who changes his position as easily as turning the pages of a book. Taiwanese independence supporters
RSS