I. Foreword Golf course is an important part of Puda project, and it is a place to meet the social, entertainment, sports and tourism needs of high-end people. Golf courses are all covered with lawns, which requires high quality of lawns. The growth of lawn is the key to the quality of golf course. Turf planted on golf courses needs high water content. The water content of turfgrass is generally 75% ~ 90%. The decrease of water content will cause lawn wilting, and when the water content drops to 60%, it may lead to lawn death. However, too much water will lead to poor ventilation of soil, poor growth of turf, induced diseases and even suffocation and death of plants. In the rainy season, if excessive rainfall cannot be discharged from the lawn surface and root layer in time, it will lead to water accumulation and root flooding. Therefore, excellent irrigation system and drainage system are the guarantee of the overall quality of lawn, and relevant personnel need to carry out scientific irrigation and drainage according to the needs of lawn grass and environmental conditions. Two. Irrigation system 1. The lawn irrigation water of golf course in the planning area of irrigation system is taken from the reclaimed water recycling pool in the high place, and the water supply mode is gravity flow water supply. 2. Lawn irrigation requires that the golf course lawn is the lawn with the largest area, the finest management and the strongest artistic sense among all ball sports venues. Different from general landscape irrigation, due to the particularity of golf course itself, such as lawn type, area size, use requirements, terrain conditions, climate conditions, site factors and so on. , determines the particularity of golf course irrigation: First, the golf course lawn irrigation area is large and the water demand is high. A standard golf course is about 60 ~100hm ~ 2, and the whole golf course is mostly covered with lawn, which requires that the lawn irrigation system of golf course should not only meet the irrigation water consumption, but also have the ability to comprehensively manage irrigation equipment. Second, the lawn water demand in different areas of the stadium is different. There are different kinds of lawn grass and lawn soil planted in the greens, tees, fairways and high grass areas of golf courses, and players have different requirements for their use. Therefore, the irrigation amount and irrigation time of lawn grass in different areas are different, especially for greens, the irrigation management requirements are more detailed. This determines that in order to implement precision irrigation, the irrigation system must combine different grass species and use conditions for regional irrigation. Third, the irrigation cycle. The lawn area of golf course is large, so irrigation is not completed at one time. Random cyclic rotation irrigation requires strict calculation and reasonable irrigation system. Fourthly, the landscape effect of irrigation. Different from ordinary garden irrigation, the golf course has beautiful scenery. Lawn irrigation should not only meet the water demand of lawn grass and maintain the spraying effect, but also the most important thing is that irrigation equipment should not damage the lawn and affect the landscape effect when used and maintained. 3. Micro-irrigation technology Micro-irrigation technology is a relatively most water-saving irrigation method and a new type of water-saving irrigation technology, including drip irrigation, micro-sprinkler irrigation and infiltration irrigation. It transports the required water (and nutrients) to the roots of crops in a continuous, uniform and controlled way through low-pressure pipes and emitters or other emitters. Micro-irrigation technology has obvious water-saving effect (micro-irrigation generally saves water by 30-50% compared with surface irrigation and water by 15-20% compared with sprinkler irrigation), saves energy and increases production, has strong adaptability to soil, topography and crop varieties, is easy to realize automatic control, and has attractive popularization and application prospects. (1) drip irrigation technology drip irrigation technology is to use pipes to send water to the roots of crops through orifices or drippers on capillaries with a diameter of about 10mm for local irrigation. It has obvious effect of saving water and increasing production. It is the most effective water-saving irrigation method in arid waters at present, and the water utilization rate can reach 95%. Drip irrigation technology is a kind of low-head irrigation, which is suitable for planting tall crops in a large area for a long time. If gardens and vineyards are irrigated, it is also suitable for irrigation of cash crops such as vegetables and flowers, large-scale crops and greenhouses. It can also be used for irrigation of field crops in arid and water-deficient areas, as well as irrigation in high-lift irrigation areas and areas with large topographic relief. At the same time, it has also developed in sandy soil and salt water areas with strong water permeability and poor water retention. (2) Micro-sprinkler irrigation technology Micro-sprinkler irrigation is an irrigation method that sprays water on the soil surface with a small flow through a low-pressure pipeline system. Micro-sprinkler irrigation technology has the characteristics of small spray flow, low working pressure, low supporting force, low spray height, small spray diameter, small water droplets, uniform spray, little influence by wind, light equipment, convenient movement, complete accessories and simple loading and unloading, and is suitable for sporadic plots and one household. Micro-sprinkler irrigation project is a new irrigation project. There are certain advantages in investment and use, so the development prospect is very broad. With the development of science and technology and social economy, micro-sprinkler irrigation technology and its engineering have developed very rapidly in the world. (3) Infiltration irrigation technology Infiltration irrigation is a new and effective underground irrigation technology after sprinkler irrigation and drip irrigation. Under the condition of meeting the physiological growth needs of plants, it changes the previous irrigation of land into direct irrigation of plant roots. At present, there are two ways of low-pressure infiltration irrigation and gravity infiltration irrigation in China. Many scholars engaged in water-saving irrigation research at home and abroad believe that underground irrigation is a promising irrigation technology not only in mechanism, technology and economy, but also in ecological environment protection, water resources protection and efficient utilization. Infiltration irrigation technology can be applied to irrigation of various crops in different areas, different topography and different soils. It can greatly save water and energy, improve the growth environment of crops, prevent and control pests and diseases, and achieve the effect of increasing production and increasing efficiency; Infiltration irrigation technology is one of the most advanced irrigation technologies in agricultural water-saving irrigation, with strong adaptability and wide application range. Infiltration irrigation can be used in saline-alkali land, because the infiltration irrigation system reduces the water supply in the field and will not cause deep leakage, which can prevent the phenomenon of salt increase caused by a large number of water leakage in saline-alkali land. 4. Automatic monitoring Traditional lawn management and irrigation experts rely on their own experience to determine the irrigation system. Now we can provide accurate meteorological data, such as rainfall, temperature, humidity, sunshine and so on. Through the monitoring instruments of the weather station, these meteorological information are transmitted to the computer central control system or managers in time so that they can adjust the procedures and irrigation systems accordingly. Automatic control and computer technology enable people to control multiple sites through complex systems, save users time, make irrigation more effective and accurate even according to the specific needs of plants, save users significantly water, labor and costs, and make stadiums and lawns and plants thrive. Automatic control is convenient to irrigate the lawn evenly in a large area, and it is carried out at the most suitable time, that is, when no one is playing at night. Irrigation is most effective at night, because evaporation caused by wind and sunlight is lower than at noon. In addition, the automation system is more convenient to make the system according to each different area. A typical golf course has various microclimate zones, from flat fairways and greens to obstacle zones and surrounding lawns, to clubs and parking lots. The central control system of golf course allows administrators to irrigate with the least amount of water according to the different needs of each area. The existing automatic stadium irrigation controller and central control system have some water-saving functions, including: (1) the start-up time controller allows shorter and more accurate running time to be set according to the individual needs of plants. This can make lawns and plants absorb water better; Reduce runoff and deep leakage waste. Surface runoff is a common problem of water resources waste, that is, the irrigation intensity is higher than the absorption speed of plants and soil. In the case of slope or clay, slope runoff will lose under the action of gravity. Dry spots often appear on sloping lawns due to insufficient water infiltration from surface runoff into roots. Irrigation central control system can reduce surface runoff according to "intermittent irrigation". (2) The length of irrigation time: the irrigation amount of the golf course in one day can meet the water demand of plants in that day, or just supplement the evapotranspiration et value in that day. (3) Water budget adjustment allows users to conveniently adjust the irrigation amount of systems and procedures according to the needs of the environment. For example, in rainy season, users can adjust the setting of "Water Budget" on the controller to 85% of peak water, thus saving 15% of water. (4) Rainfall delay allows users to delay irrigation time when irrigation is not needed (usually in rainy season) and start it automatically at an appropriate time. (5) Rainfall monitoring has the function of rainfall monitoring in the central control system of irrigation computer. This function can not only pause and delay rainfall, but also judge whether rainfall meets the water storage capacity of lawn roots according to rainfall. If enough, it will be delayed by 24 hours or 48 hours, depending on your needs. If the rainfall is insufficient, the irrigation system will automatically start the program to complete the replenishment of insufficient rainfall. This function is especially suitable for rainy areas in the south, and the water saving effect is very obvious. (6) Intermittent Irrigation Intermittent irrigation is set according to soil infiltration rate and terrain slope, and the traditional one-time irrigation technology is changed to multiple irrigation, and a small amount of multiple irrigation is used to reduce surface runoff, soil erosion and waste. There is not much flat land on the golf course, and this function is an effective means to irrigate the sloping land. Intermittent irrigation function can be realized by irrigation central control system. Iii. Drainage system 1 Features of the drainage system of the golf course (1) As a sport, the lawn in the golf course should not only maintain a certain landscape function, but more importantly meet the competition requirements. The stadium needs high standard drainage design to maintain a good environment and ensure the integrity of the stadium hardware and equipment. Therefore, the drainage system of golf course should be equipped with surface drainage system to eliminate natural rainfall, and at the same time equipped with underground drainage system to maintain the normal use function of lawn, so as to ensure the quality and durability of lawn, reduce the maintenance cost of lawn and ensure the normal play. (2) The golf course covers a large area, and a standard golf course generally covers an area of 60~ 100hm2. The lawn drainage system design of golf course is consistent with the landscape design of surface undulation, and the larger catchment area is changed into smaller catchment area through terrain undulation, so that the drainage catchment area is decentralized and miniaturized. Due to the different sizes of greens, bunkers and fairways in golf courses, the catchment area is also very different. (3) The ground drainage system of golf course lawn is similar to urban street rainwater drainage system. But the difference is that urban streets are hard cement pavements, which all produce surface runoff after rainfall, and there is almost no infiltration of rainwater. However, the whole golf course is covered with lawn, and for the sake of landscaping and safety, the designer has artificially transformed the terrain in the golf course, which makes the terrain in the golf course fluctuate and has a great influence on the ground runoff of rainwater, including the ground runoff coefficient and the design displacement. 2. Planning of golf course drainage system The water discharged from golf course lawn is partly saturated soil water formed by rainfall or irrigation water infiltration, and partly surface runoff formed by rainfall. In order to remove these two parts of water in time, the corresponding golf course lawn drainage system is divided into surface drainage system and underground drainage system. The ground drainage of golf course is mainly through ground modeling drainage and pipeline drainage. Ground modeling drainage is the design of ground modeling, which makes the water that can't naturally seep down along the ground and collect it in lakes, drains or rainwater wells in the stadium. The purpose of simulated surface drainage is to disperse surface runoff and reduce the erosion of surface by rainfall runoff. Pipeline drainage is a drainage system that combines ground confluence with rainwater wells and groundwater drainage pipes. It can shorten the water collection process and divide a larger water collection area into smaller water collection areas. The ground drainage of Puda Golf Course adopts the combination of ground modeling drainage and pipeline drainage, and the underground drainage adopts pipeline drainage. The rainwater in the site can be discharged in time by reasonably setting the ground shape and drainage outlet. Rainwater is collected through pipelines and discharged into artificial lakes as landscape replenishment. In addition, considering the needs of golf course water and landscape, the drainage outlet of golf course lawn drainage system is also special. Golf courses use a lot of water, and the setting of water body in the golf course is not only a means of beautification, but also one of the water sources of sprinkler irrigation system. Therefore, part of the drainage outlet of golf course lawn drainage system is located at the lake in the venue, and the other part is discharged outside the venue in combination with the drainage outlet of the venue, which is beneficial to the recycling of water and achieves the purpose of saving water. In order to prevent silt from blocking the outlet, the outlet located by the lake should not go deep into the bottom of the lake, nor should it be higher than the lake surface to affect the landscape. The drainage capacity of the drainage system around the stadium should also be considered in the combination with the drainage outlet of the stadium. 3. The principle of pipeline drainage (1) is the principle of nearby drainage, and the excess water is discharged to the nearby drainage area to avoid lawn water accumulation and reduce the water flow in the drainage pipe. (2) The drainage pipe runs from high to low according to the terrain. When the terrain is satisfied, the slope of the drainage pipe section should be as large as possible to ensure smooth water flow in the drainage pipe. (3) The drainage pipe section should not be completely connected in series through the rainwater well, otherwise it will increase the flow of the downstream section, and the section connecting the two rainwater wells should not be too long, otherwise an inspection well needs to be set in the section. (4) When laying drainage pipes, try to arrange them in pieces to reduce the number of water outlets, so as not to adversely affect the landscape of the venue. (5) The pipeline should be as straight as possible, but it is not allowed to pass through the bottom of the green or bunker.