Method and system for observing non-point source pollution outflowing load of paddy field
A non-point source pollution and paddy field technology, applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve the effect of overcoming the inability to observe in time, reasonable results, and high practicability
Inactive Publication Date: 2013-09-11
BEIJING NORMAL UNIVERSITY
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For the actual situation that there are usually multiple runoff outlets in the field during rice planting and it is difficult to set up runoff ponds on site, this method has obvious limitations
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[0038] The Jingxi rice planting base in Shangzhuang Town, Haidian District, Beijing, transplanted seedlings on May 30, 2012, and harvested on October 28, with a total growth period of 152 days. According to the growth characteristics of rice, the rice growth period is divided into four stages: seedling rejuvenation stage, tillering stage, jointing booting stage and maturity stage. May 30-June 6, 2012 is the greening period of transplanting seedlings, June 7-July 17 is the tillering period, July 18-August 22 is the jointing and booting period, and August 23-10 May 28th is the maturity period. During the rice growth period in 2012, fertilization was applied twice, and the base fertilizer and the topdressing fertilizer were applied once respectively.
[0039] Select a representative paddy field in the study area for observation, the area of the observed paddy field is about 5000m 2 . Install the observation system of non-point source pollution load in rice fields, collect in...
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The invention discloses a method and system for the observing non-point source pollution outflowing load of a paddy field. According to the observation method, a process line of an evapotranspiration and leakage loss amount of a paddy field is obtained according to the acquired information such as a water depth value, irrigation and manual water drainage, the date of water drainage and the corresponding daily outflowing water amount of the paddy field are further obtained, and the needed pollution outflowing load of the paddy field is calculated according to the daily outflowing amount and the pollutant concentration value of the corresponding date. Compared with an existing observation method, the method and system for observing the non-point source pollution outflowing load of the paddy field provides a novel method for observing the non-point source pollution outflowing load of the paddy field, resolves the problem that the non-point source pollution outflowing load is random due to rainfall and can not be observed timely, and is simple and convenient to carry out, reasonable in result, reliable and high in practicability.
Description
technical field [0001] The invention belongs to the field observation field of agricultural non-point source pollution load, and in particular relates to an observation method of non-point source pollution outflow load of paddy fields and an observation system applying the method. Background technique [0002] Nonpoint source pollution (NPS), also known as non-point source pollution (Diffuse Pollution), refers to the pollutants in the atmosphere, ground and underground entering rivers, lakes and Water pollution caused by water bodies such as oceans. Compared with point source pollution, non-point source pollution has the characteristics of randomness and intermittency in time, extensive spatial distribution, and uncertainty in pollutant composition and load. These characteristics make it possible to quantify non-point source pollution loads. Observation becomes more difficult. Especially for rice fields, there are often multiple runoff outlets in the rainfall process in pr...
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IPC IPC(8): G06F19/00
Inventor 苏保林黄宁波李瑞瑞杨武志申萌萌
Owner BEIJING NORMAL UNIVERSITY