New rainwater harvesting technology
   1 , the use value of rainwater
   "All the water is rainwater," This is America rainwater harvesting expert Richard? Haynie often say. On the earth we live in, whether it is the water in the underground water reservoir or the water in the river, it fell from the sky at the earliest. When the rain falls on the ground, it is infiltrated into the underground water storage layer through the soil and stone layers, and it is contaminated with minerals and salt, which is beneficial to human health. The most important thing is that the groundwater hardness is generally high, and the rainwater is reused. It can save the soft water material used in the groundwater treatment, and can also save soap, detergent and the like during washing. Therefore, scientific rainwater harvesting, rational storage and energy-saving use are an effective way to save energy and reduce emissions, and it is an effective guarantee to give full play to the value of rainwater utilization. Welcome to the company's official website http://
   2. China's water resources situation
   China is a country with relatively poor water resources and extremely uneven spatial and temporal distribution. The inter-annual variation of water resources during the year, the distribution of precipitation and runoff during the summer months is concentrated in the summer months; the continuous occurrence of Lianfeng and continuous dry years, causing frequent drought disasters in some areas and prominent contradiction between water supply and demand. Total water resources of more than 28,000 billion m3, ranking sixth in the world, but per capita water resources is only 2300m3, about 1/4 of the world average. 81 % of the country's water resources are concentrated in the Yangtze River and its south, while the Huaihe River and its north area account for only 19 % of the country's water resources .
   In general: the distribution of water resources is more in the south than in the north, and in the eastern region than in the west. Due to the differences in water resources distribution and the increasing pollution of water resources in China, water resources in many cities in China are facing serious shortages and shortages. The main reasons for the shortage and shortage of urban water resources are as follows: First, the total amount of water resources is congenitally insufficient, the population is large, and the per capita water resources are small. Second, the water quality of the water source is deteriorating, which cannot meet the functional requirements of the normal circulation of water, and greatly reduces the utilization of effective water resources. In 2007 , the comprehensive outbreak of Taihu Lake and Chaohu Lake cyanobacteria further ignited the police.
   Therefore, the comprehensive utilization of rainwater is an effective way to alleviate the lack of water resources in China.
   3 , common rainwater utilization technology
   Common rainwater utilization technologies can be divided into three parts: rainwater harvesting, rainwater treatment, and rainwater supply.
   Urban rainwater utilization in China started late, and there are some small and partial non-standard applications mainly in water-deficient areas. In some foreign countries, such as Germany and Japan, the recycling of urban rainwater and the collection and utilization of rainwater have a long history. Its experience and methods are of great significance to most cities in China, especially those with severe water shortages.
   There are three main methods of urban rainwater harvesting in Germany : one is the roof rainwater harvesting system, and the rainwater collected is mainly used for non-potable water in households, public places and enterprises. The second is the rainwater interception and infiltration system. Road rainwater is discharged through sewers into large reservoirs along the way or through groundwater to replenish groundwater. There are sewage intercepting baskets at the rainwater pipelines of German city streets to intercept pollutants carried by rainwater runoff. The third is the rainwater utilization system of the ecological community. The community has a shallow shallow ditch along the drainage channel, and the surface is planted with turf for infiltration when the rainwater runoff flows. Rainwater that exceeds penetration capacity enters a rainwater pond or constructed wetland as a water feature or continues to infiltrate.
Strobes And Blinders,Stage Strobe Lights,Led Strobe Panel,Led Strobe Blinder
EV LIGHT Guangzhou Co., Ltd , https://www.evlightpro.com