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Indoor simulation system applied to pollutant migration process researches under artificial rainfall

A technology for simulating the system and migration process, which is applied in the fields of geosciences and environmental sciences. It can solve the problems of long observation period, uneven annual division, and slow data speed, and achieve high rainfall stability, low cost, and prevent nozzle clogging.

Inactive Publication Date: 2014-08-06
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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Problems solved by technology

[0004] Due to the long period of natural rainfall, strong seasonal distribution, and extremely uneven annual division, the observation period of field and experimental plots based on natural rainfall is long and the speed of data acquisition is slow

Method used

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  • Indoor simulation system applied to pollutant migration process researches under artificial rainfall
  • Indoor simulation system applied to pollutant migration process researches under artificial rainfall
  • Indoor simulation system applied to pollutant migration process researches under artificial rainfall

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Embodiment example 1

[0034] Implementation case 1: Research on the migration law and leaching flux of nitrogen in the soil of a typical agricultural area of ​​Fuxian Lake in Yunnan under different rainfall intensities. A large amount of farmland is concentrated in the catchment area on the north bank of Fuxian Lake in Yunnan. The nitrogen and phosphorus pollution caused by the application of chemical fertilizers in farmland has attracted more and more attention. Agricultural non-point source pollution has now become an important factor in the water pollution of Fuxian Lake. . The groundwater level in the north bank of Fuxian Lake is relatively shallow, about 60cm. Due to the impact of rainfall infiltration, the groundwater in this area may have been polluted by farmland soil, pesticides and fertilizers, and the north bank plain area has an average slope of 6.4‰ from the north (plain area) Tilting to the south (the lake), the general flow direction of groundwater is from north to south, infiltratin...

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Abstract

The invention provides an indoor simulation system applied to pollutant migration process researches under artificial rainfall. The indoor simulation system can satisfy similarity conditions of the rainfall uniformity, the median raindrop diameter, the terminal velocity and the raindrop spectrum, can be directly used in the researches and stimulation of the migration process of soil (deposit)-water interface pollutants under the artificial rainfall conditions, and mainly includes a rainfall control system, a pollutant vertical transport simulation system and a sample collection system; and the above simulation device can be used as an experimental device for carrying out migration conversion and repair mechanism researches of pollutants in soil / sediment. The simulation device has the characteristics of strong practicability, high reliability, low cost, compact structure, convenient installation, demounting and replacement of parts, suitable simulation conditions, maneuverability and good application popularization value.

Description

technical field [0001] The invention relates to laboratory simulation equipment for studying pollutant interface migration and physical process, in particular to an indoor simulation control system applied to the research of pollutant migration and transformation in soil and water interface process, which belongs to the field of geology and environmental science. Background technique [0002] When carrying out soil pollutant migration process tests, soil infiltration tests, and other scientific experiments that require simulated rainfall, in order to avoid the influence of natural factors, it is necessary to quickly obtain the data required for the test within a predetermined time and successfully complete the planned test. Usually, artificial simulated rainfall devices are used to artificially simulate rainfall. The current artificial simulated rainfall is usually divided into two types: nozzle type and needle tube type. Influenced by the effect, the water flow is broken to...

Claims

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Application Information

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IPC IPC(8): G01N33/24
Inventor 徐力刚张奇徐进潘继征
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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