Integration device for collecting lateral seepage of rice field and overland runoff

Abstract

The invention relates to an integration device for collecting lateral seepage of a rice field and overland runoff. The integration device is characterized by comprising a top sealing collection box with a right trapezoid-shaped longitudinal section, wherein the box body is vertically inserted into the soil on the ridge of the rice field by taking the slope as a base plate, and a lateral seepage storage trough is formed at the inclined bottom; a U-shaped trough plate with a U-shaped longitudinal section is embedded into the collection box, and the bottom of the U-shaped trough plate is downwards inclined from the liquid feeding side wall to the liquid discharging side wall; the U-shaped trough plate is hermitically connected with the box body to form an overland runoff storage trough; a lateral seepage filtering net is arranged at a lateral seepage inlet in the bottom of the liquid feeding side wall below the outwards folded edge at the top of the liquid feeding side, and an overland runoff inlet with a sliding baffle capable of adjusting the liquid feeding height is formed in the liquid feeding side wall above the outwards folded edge at the top of the liquid feeding side; an overland runoff filtering net is arranged at the outwards folded edge at the top of the liquid feeding side of the U-shaped trough; a lateral seepage flow guide pipe and an overland runoff flow guide pipe are arranged and are led to a suction sampling device from the corresponding liquid discharging side wall. The integration device has the advantages of reducing the investment, increasing the utilization rate of equipment and facilitating the use.

Description

technical field [0001] The invention relates to a sampling and monitoring technology for environmental impact of paddy field nutrient loss in the fields of environmental science, agricultural science and soil science research, in particular to an integrated device for collecting paddy field lateral seepage and surface runoff. Background technique [0002] With the development of science and technology, modern agricultural technology has not only brought high yields of crops, but also caused difficult-to-control agricultural non-point source pollution and the destruction of rural ecological environment. According to statistics, 30%-50% of the earth's surface has been affected by agricultural non-point source pollution, and more than 40% of the main water pollutants in my country come from agricultural non-point source pollution. Due to the excessive application of chemical fertilizers and pesticides, the utilization rate of nitrogen and phosphorus is generally low, and a larg...

AI Technical Summary

Problems solved by technology

[0003] At present, the sampling of surface runoff and lateral seepage is generally collected at the same time by building seepage pits, but this method needs to build fixed seepage pits, which requires a large amount of cement pouring, time-consuming, labor-intensive, large investment, and cannot be disassembled. The utilization rate is low and the measurement error is large

In recent years, surface runoff and lateral seepage have been sampled by using experimental devices instead of fixed seepage pits, but they are all carried out independently by using different experimental devices, and the repeated investment in manpower and material resources is large. In particular, surface runoff is only produced during heavy rain or Occurs under extremely heavy rainfall climate conditions, and the frequency of occurrence is low, resulting in extremely low frequency of device use, high equipment idle rate, waste of resources, and inconvenient management

In addition, the existing experimental devices for lateral seepage are generally installed in paddy fields, without considering the interception of lateral seepage by field ridges, resulting in large measurement results of nutrient content in lateral seepage, which affects the accurate evaluation of nutrient loss in paddy fields

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