Key Laboratory of the Yellow River Sediment of Ministry of Water Resource

Zhengzhou, China

Key Laboratory of the Yellow River Sediment of Ministry of Water Resource

Zhengzhou, China
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Li Q.,Yellow River Institute of Hydraulic Research | Li Q.,Key Laboratory of the Yellow River Sediment of Ministry of Water Resource | Hu Y.,Yellow River Institute of Hydraulic Research | Sun J.,Yellow River Institute of Hydraulic Research | Li H.,Xi'an University of Technology
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2011

In order to reveal the influence of water and fertilization on load intensity of agricultural non-point source pollution in field, based on the estimation model of agricultural non-point source pollution in the field and experimental data, the load intensity of agricultural non-point source pollution in different water and fertilization in paddy field was calculated. The results showed that there was a positive exponential correlation between the irrigation amount and load intensity, and there was a positive correlation between the fertilization and load intensity. Secondly, the load intensity had obvious difference in different fertilization modes even with same fertilization level. Compared with other related research results and the present irrigation and fertilization condition in China, the agricultural non-point source pollution effects of the different irrigation and fertilization process in field were discussed. It was concluded that the irrigation and fertilization process in field had obvious influence on agricultural non-point source pollution, so taking the control measures to reduce the pollution was important, such as saving irrigation, scientific fertilization and reasonable adjust process of irrigation and fertilization in field etc.


Li Q.-K.,Yellow River Institute of Hydraulic Research | Li Q.-K.,Key Laboratory of the Yellow River Sediment of Ministry of Water Resource | Chen W.-W.,Yellow River Institute of Hydraulic Research | Sun J.,Yellow River Institute of Hydraulic Research | Li H.-E.,Xi'an University of Technology
Huanjing Kexue/Environmental Science | Year: 2010

Taking the Qingtongxia irrigation district at the Yellow River upstream as an example, based on the monitor experiment material, this paper has analyzed the migration characteristics of nitrogen and phosphorus in the water conveyance system, the field system and the drainage system in the irrigations district. The results showed that, the concentrations of nitrogen and phosphorus showed increasing tendency in the water conveyance system and the increasing extent related to the channel substrate and content of nitrogen and phosphorus. In the field system, the fertilizer application process has a great influence on the concentration of nitrogen and phosphorus in farmland irrigation drainage and soil. During the crop growing period, nitrogen content in the soil above 60 cm changes greatly, total phosphorus content in the soil changes slightly correspondingly. In the drainage system, the concentrations of nitrogen and phosphorus showed decreasing tendency, from the end of farm ditch to outlet of agricultural drain, the concentration of ammonia nitrogen, nitrate nitrogen and total phosphorus in the agricultural drain decreased by 25%, 41% and 45% respectively. Affected by livestock and poultry breeding pollution and so on, the concentration of nitrogen showed increasing tendency in mainstay drainage ditch.


Li Q.,Yellow River Institute of Hydraulic Research | Li Q.,Key Laboratory of the Yellow River Sediment of Ministry of Water Resource | Hu Y.,Yellow River Institute of Hydraulic Research | Sun J.,Yellow River Institute of Hydraulic Research | Li H.,Xi'an University of Technology
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2010

The contrast test of monitoring uncontrolled drainage and controlled drainage were carried out at the Qing Tong Xia Irrigation District in Ningxia Hui Autonomous Region. The concentration and load variation characteristics of salinity, total phosphorus, nitrate-nitrogen and ammonia-nitrogen in farmland drainage under controlled drainage condition were analyzed, and the mechanism of reducing drainage and sewage was discussed. The results showed that comparing to uncontrolled drainage, with controlled drainage, the drainage amount would reduce by 43.01%, the concentration of salinity, total phosphorus, nitrate-nitrogen and ammonia-nitrogen would reduce by 7.68%, 17.39%, 18.16%, 9.20% respectily, and the pollution load would reduce by 46.49%, 44.46%, 57.51%, 38.89% respectively. The reduction of pollution load results from joint actions of drainage reduction and pollution concentration decrease. The drainage reduction plays the leading role and pollutant concentration decrease is the secondary factor.


Li Q.-K.,Yellow River Institute of Hydraulic Research | Li Q.-K.,Key Laboratory of the Yellow River Sediment of Ministry of Water Resource | Hu Y.-W.,Yellow River Institute of Hydraulic Research | Li H.-E.,Xi'an University of Technology
Huanjing Kexue/Environmental Science | Year: 2011

Drainage ditch system is the transitional zone between yield in the field and receiving waters for agricultural non-point source pollutants. Based on the brief analysis of the migration and transformation process of agricultural non-point source pollutants in drainage ditch system, the one-dimensional transport model of agricultural non-point source pollutants in drainage ditch system was constructed on the basis of the equation of continuity of flow and pollutants migration transform. Taking the Di Yi drainage ditch system, in the Qing-Tong-Xia irrigation district at the Yellow River upstream, as an example, combining with actual situation, the drainage discharge and concentration of nitrate nitrogen and total phosphorus were simulated by this model. The results show that the simulated drainage discharge accords with measured data approximately and Nash-Suttcliffe coefficient is 0.82, the simulated concentration of nitrate nitrogen and total phosphorus in farmland drainage was reasonable.


Li Q.-K.,Yellow River Institute of Hydraulic Research | Li Q.-K.,Key Laboratory of the Yellow River Sediment of Ministry of Water Resource | Sun J.,Yellow River Institute of Hydraulic Research | Li H.-E.,Xi'an University of Technology
2010 2nd Conference on Environmental Science and Information Application Technology, ESIAT 2010 | Year: 2010

Estimation of pollutant concentration in agricultural drainage is the key point of quantitative research on agricultural non-point source pollution load. Synthesis of fertilization and irrigation is used as an impulse input to the farmland, meanwhile, the pollutant concentration in agricultural drainage is looked as the response process corresponding to the impulse input, the migration and transformation of pollutant in soil is expressed impliedly by Inverse Gaussian Probability Density Function, the law of pollutants migration and transformation in soil at crop different growth periods is reflected by adjusting parameters of Inverse Gaussian Distribution. Based on above, the estimation model for pollutant concentration in agricultural drainage at field scale was constructed. Taking the typical experimentation area of Qing Tong Xia Irrigation District at the Yellow River upstream as an example, the concentration of nitrate nitrogen and total phosphorus in paddy field drainage was simulated by this model. The results show that the simulated results accorded with measured data approximately and Nash-Suttcliffe coefficients was 0.972 and 0.964 respectively, get a good simulation effect. ©2010 IEEE.


Li Q.-K.,Yellow River Institute of Hydraulic Research | Li Q.-K.,Key Laboratory of the Yellow River Sediment of Ministry of Water Resource | Hu Y.-W.,Yellow River Institute of Hydraulic Research | Li H.-E.,Xi'an University of Technology
2010 2nd Conference on Environmental Science and Information Application Technology, ESIAT 2010 | Year: 2010

The migration and transformation of agricultural non-point source pollutants in drainage ditches is an important step of agricultural non-point source pollution control and management. On the bases of analyses on the ecological structure of drainage ditches and purification mechanism of ditch wetland to agricultural non-point pollutants, experiment was conducted taking the XI YU drainage ditch system, in the Qing-Tong-Xia Irrigation District at the Yellow River upstream, as an example. The results show that ditch wetland has better purifying effect to agricultural non-point pollutants, of which, the purification rate of total phosphorus and ammonia nitrogen were27.46%and 21.80% respectively. According to the current research situation, the further research object includes three aspects, quantitative study on different action of each component in drainage ditch ecosystem, migration model of agricultural non-point source pollutants in drainage ditch and the relationship between ditch wetland application and regional eco-environment at the macro level. ©2010 IEEE.

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