Flood

Guidelines for High-Temperature Drought Early Warning and Disaster Mitigation Measures in Tea Gardens Hunan Provincial Tea Industry Technology System Li Saijun & Li Wei July 25, 2024 Since early July, our province has been experiencing persistent high temperatures and droughts, with the drought rapidly worsening in most areas, severely impacting normal tea garden production. On July 25, the Hunan Meteorological Observatory issued the first red alert for extreme heat of the summer. In response to this extreme high-temperature and drought climate disaster, the Hunan Provincial Tea Industry Technology System has timely provided technical guidance, proposing specific measures for pre-disaster prevention and protection, as well as post-disaster recovery work in tea gardens. I. Pre-Disaster Prevention and Protection Measures (1) Interspace Covering ① Lay an appropriate amount of straw, fallen leaves, etc., in the gaps between tea plants to cover the soil surface at a thickness of 5-10 cm. This layer helps protect the soil, reducing water evaporation and aiding in the retention of nutrients in the soil. ② Intercropping green manure can effectively provide shade, reduce temperatures, and improve the microclimate within the tea garden, thus effectively preventing damage to tea plants from high temperatures and intense sunlight. (2) Scientific Shading…

On July 1, our city experienced heavy rainfall, with 24-hour accumulated precipitation exceeding 100 millimeters at 23 monitoring stations, the highest being 172.9 millimeters at Changling station. The intense short-term rainfall led to landslides, collapsed embankments, mud accumulation, and waterlogging in some tea gardens, causing varying degrees of flood damage and related secondary disasters. To minimize losses from tea production due to disasters, Tongcheng Kangzhiyuan Family Farm promptly launched science popularization activities for disaster mitigation in tea gardens. Tea farmers can take the following remedial measures: 1. Drainage and Clearing of Silt and Waterlogging For tea gardens with standing water, drainage ditches should be promptly cleared and dredged, and deep trenches opened to drain the water as soon as possible, avoiding waterlogging that could harm the tea trees due to prolonged water accumulation. At the same time, mud, sand, stones, and other debris that have washed into the tea garden, as well as mud on the branches and leaves of tea plants, should be cleared away promptly. Efforts should be made to reduce soil moisture and environmental humidity as soon as possible to prevent root rot or decay caused by prolonged soaking of tea trees. 2. Restoration of Tea Gardens…

The plum rain is a concentrated period of rainfall that occurs annually from June to July in the mid-lower reaches of the Yangtze River, including tea areas in southern China, as well as subsequent mountain floods often accompanied by typhoons in August and September. Experience has shown that improper disaster prevention or neglect during the plum rain and mountain flood season can pose significant threats and losses to tea production, particularly in mountainous tea areas in southern China. To minimize the adverse effects of plum rain and subsequent mountain floods on tea production, especially in southern China, we have compiled measures for disaster prevention and mitigation in tea production for your reference. 1. Pay Attention to Plum Rain and Mountain Flood Forecast and Warning Information After June each year, tea areas, particularly those in mountainous regions of southern China, should promptly monitor the latest weather forecasts and mountain flood warnings. Be vigilant against the risk of mountain floods due to continuous rainfall or short-term heavy downpours and strong convection weather. Closely watch changes in weather conditions and rainfall levels. Once there is a forecast or warning of significant rainfall, it's better to be overly cautious and enter a state of…