1, overview
The river after the new autumn demonstration area is located in the Toudaohe River Watershed of Zhangwu County in the eastern region, the total area of 164.6 km2, of which the valley plain is 72 67km2. Demonstration area the average annual precipitation is 497 4mm, in 2011 the total population is 11418 people, demonstration area crops are maize, irrigation irrigation, most of the small pipe irrigation, 3 times of irrigation, irrigation period of 4 - August, current year comprehensive irrigation quota for agricultural irrigation water by 3 million 738 thousand M3 1875m3/ hm22011 no, the industrial water in this area, the regional water are all groundwater. The demonstration area of water-saving grain project area is 21, with a total area of 2954.6 Hm2, of which the transformation of Hm2, a new 193 hm2. Under the drip irrigation, the water requirement was 2 million 659 thousand and 200 m3.
2, reasonable analysis of water intake scheme
2.1, single well water inflow and determine the radius of influence
According to "Zhangwu County in Liaoning Province comprehensive hydrogeological investigation report" to determine the single well water inflow is 500 ~ 1200m3/ D. According to the calculation of single well water yield for the 755 6m3/ D pumping test data. Comprehensive demonstration area to determine the single well yield for 756m3/ D.
2.2, single well control area and the number of wells
The total land area of the project area is 2954.6 Hm2, the irrigation method is drip irrigation, the project area has determined the single well water yield of 31 5m3/ h, and the single well control area is calculated to be hm2. Reconstruction project area has been built 498 wells water source wells, select the transformation of the eye of the water wells, water wells in the new project area built 17 eyes, 244. In this demonstration area, 261 wells are needed to meet the water demand.
3, the current situation of water use analysis and planning annual water demand forecast
3.1, the current situation of water analysis
In 2011 the region all of the rural population, a total of 11418 people, with 280 thousand and 900 m3 of water, water quota for 67 4L/ D; 6400 head of livestock, with 140 thousand and 100 m3 of water, quota of 60L / head - D; small livestock 23120, water 211 thousand M3, 25L/ D, head of quota of actual irrigation; water area of 1993.6 Hm2, 3 million 738 thousand M3, 1875 m3/ hm2 quota. Demonstration area of industrial water, the actual total water consumption in 2011 was 4 million 370 thousand M3, see table 1.
Table 1 the monthly distribution of water consumption in current situation
3.2, planning annual water demand forecast
3 2.1, life water demand forecast
According to the current situation of Zhangwu county within the scope of the population data to predict the number of planning population in 2015 and 2020 were 11504 and 11626 respectively. According to Liaoning province "industrial water quota" of rural residents in 2015 and 2020 to determine the water quota was 67 4L/ - D, by calculation, in 2015 2020, the daily life of residents with water were 283 thousand M3, 286 thousand m3.
3. Agricultural water demand forecast 2.2
1) irrigation water demand
The present situation of regional irrigation area of 2761 Hm2, the use of underground water source wells irrigation project, in 2011 the actual irrigation area of Hm2, water consumption of 3 million 738 thousand m3. It is proposed to adopt the technology of drip irrigation under film, and the annual water quota is 900m3/ Hm2, all of which are used for underground water well engineering. After calculation, 2015, 2020, agricultural water demand were predicted to be 2 million 659 thousand and 200 m3.
2) water demand of forest and Animal Husbandry Fishery
The average increase in 2015 and 2020 year forecast level of livestock rate was 9 per thousand and 6 per thousand, the average small livestock growth rate was 11 per thousand and 8 per thousand. At the same time, according to Liaoning Province, industry water quota, in 2015 and in 2020, livestock, livestock water quota are 60L / head D and 25L/ head D. Forecast in 2015, in 2020, livestock water consumption was 370 thousand and 200 m3, 386 thousand and 100 m3, the results are shown in Table 2, 3, 4.
Table 2 Toudaohe River - new demonstration area planning Sarah water demand forecast
Table 32015 monthly allocation of water consumption for the year
Table 42020 monthly allocation of water consumption for the year
4, water intake reliability analysis
4.1, groundwater resources
It is proved by calculation that the annual average groundwater recharge is 8 million 689 thousand m32015, and the groundwater consumption is about m3, which accounts for more than the average annual groundwater recharge of 38.1%. In 2020, the groundwater consumption was 3 million 331 thousand and 300 m3, which accounted for the average annual total recharge of groundwater in the year of 38.3%. Therefore, under the condition of years of average water supply, the annual water level can be satisfied.
In 4.2, the project water intake analysis
Irrigation water consumption after the implementation of the project is 2 million 659 thousand and 200 m3. The total water consumption in the region was 4 million 374 thousand m32015, and the total water consumption in 2020 was reduced to m3333. of 130 thousand m3. After the implementation of the project, the total area of water in 2015 and 2020, compared with the current situation by reducing the number of M3, 1 million 38 thousand and 700 m3, 1 million 57 thousand and 600.
5, conclusion
New area using drip irrigation water-saving irrigation technology as a new way, is conducive to ecological protection, the proposed transformation of water wells 177 eyes, the new water source wells 561. Water district project from the village far away, no other users nearby, on the third a slight impact. This project belongs to the dispersion of the discontinuous water, the quantity of water in the wet period can be compensated, on the ecological environment of groundwater dynamic effects, and other water users have little effect. This project does not increase the amount of water, is a water-saving projects, is conducive to ecological protection.
Reference:
Cui Fengyou. Demonstration of mixed water intake for advanced thermal power plant [J]. Journal of Heilongjiang College of water resources, 2009 (04): 113 - 115
2 Guiquan Ju, Zhao Guangzhong, Yu ho. Construction project of Songbei thermal power plant water source analysis J. Heilongjiang water conservancy science and technology, 2007 (01): 101 - 102
[Wang] [Wang] Wang Xin. The water source of the new project in the new iron mine project [J]. Groundwater, 2009 (02): 63 - 64104
4 more than Gangjie, Hou Junping. Analysis of J reliability in a power plant. The reservoir water supply and drainage, 2005 (12): 51 - 53
Tao Tielin, Wang Dawei. Analysis of water quality and water quality of reclaimed water used in construction projects [J]. Jilin water conservancy, 2007 (07): 34 (in Chinese). (in Chinese),