Method for monitoring forest land surface runoff volume and sediment loss amount

A technology for surface runoff and loss, applied in the measurement of flow/mass flow, liquid/fluid solid measurement, volume/mass flow generated by mechanical effects, etc. To achieve the effect of high promotion and use value, accurate monitoring data and low cost

Active Publication Date: 2017-09-22
LISHUI ACAD OF FORESTRY
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Problems solved by technology

One is the traditional method, using cement to build a reservoir and sampling in real time on site. This method has accurate results, but it is not conducive to field operations. If the monitoring point is remote, it is difficult to sample in real time on site
The other is semi-automatic and fully automatic electronic equipment. Semi-automatic equipment monitors more runoff, and real-time sampling is required for sediment content. After comprehensive land preparation, the sediment loss is large, and the tipping bucket measurement is prone to failure; fully automatic electronic monitoring equipment saves labor and time. , convenient, but electronic equipment needs direct current, and it is difficult to monitor and obtain electricity in remote woodlands in the wild, and the cost of equipment is high, and maintenance is difficult

Method used

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  • Method for monitoring forest land surface runoff volume and sediment loss amount

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Embodiment 1

[0028] 1.1 Select monitoring forest land: select a piece of chestnut forest in Yangbei Village, Qingyuan County, Zhejiang Province with an area of ​​80m 2 The selected woodland is quadrilateral, 15m long, 5.3m wide, with basically the same slope aspect, with a slope of 20 degrees, and almost no understory vegetation.

[0029]1.2 Construction of water retaining strips: first clear the forest land in the range of 30cm wide around the selected monitoring forest block, remove the weeds and litter on the ground, and take the upper boundary of the monitoring forest block as a reference. Dig a shallow ditch with a depth of 10-15cm and a width of 15-20cm on the upper boundary, left boundary and right boundary respectively, and bury the prepared water retaining strip with a width of 15-20cm in the ditch. The height requirement of the water retaining strip is 5-10 cm above the surface, and use soil to compact both sides of the water barrier to make it stand upright. The part buried in t...

Embodiment 2

[0038] 2.1 Select monitoring forest land: select a piece of land preparation area of ​​100m in a village fir forest in Liandu District, Zhejiang Province 2 The selected woodland is quadrilateral, 20m long and 5m wide, with basically the same slope aspect and a slope of 22 degrees.

[0039] 2.2 Construction of water retaining strips: first, clean up the forest land in the 40cm wide border around the selected monitoring forest block, remove small shrubs, Osmanthus, and weeds on the ground, and take the upper boundary of the monitoring forest block as a reference , dig a shallow ditch with a depth of 10-15cm and a width of 15-20cm on the upper boundary, left boundary and right boundary respectively, and bury the 1 / 2-2 / 3 part of the water retaining strip with a width of 15-20cm prepared in advance In the ditch, use soil to compact both sides of the water barrier to make it stand upright, and ensure that the surface runoff water outside the monitoring area cannot flow into the moni...

Embodiment 3

[0048] 3.1 Select the forest land for monitoring: select a piece of moso bamboo forest in a village in Songyang County, Zhejiang Province with an area of ​​90m 2 The selected woodland is a quadrilateral, 30m long and 3m wide, with basically the same slope direction, with a slope of 18 degrees, and the understory vegetation is weeds.

[0049] 3.2 Construction of water-retaining strips: first, clean up the forest land in the 40cm wide border around the selected monitoring forest block, remove small shrubs, Osmanthus, and weeds on the ground, and take the upper boundary of the monitoring forest block as a reference , dig a shallow ditch with a depth of 10-15cm and a width of 15-20cm on the upper boundary, left boundary and right boundary respectively, and bury the 1 / 2-2 / 3 part of the water retaining strip with a width of 15-20cm prepared in advance In the ditch, use soil to compact both sides of the water barrier to make it stand upright, and ensure that the surface runoff water ...

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Abstract

A method for monitoring the forest land surface runoff volume and the sediment loss amount relates to hydrographic surveying. The method is characterized by comprising the following steps that 1, a monitoring forest land is selected; 2, water retaining strips are arranged; 3, a water introducing ditch is built; 4, a water storage device is installed; 5, a water meter and a water collector are installed; 6, the land surface runoff volume is monitored; 7, the sediment loss amount is monitored. A monitoring device is low in cost, the automatic mechanical complete flow monitoring technology is adopted for the forest land surface runoff volume and the sediment loss amount, operation is simple, maintenance is convenient, the problems of device failure or blackout or the like do not exist, monitoring data is accurate, the result is reliable, the method can be widely applied to monitoring over the land surface runoff volume and sediment loss amount of Chinese fir forests, phyllostachys edulis forests, castanea henryi forests, Chinese chestnut forests, public welfare forests and the like, and the application value and the popularization value are high.

Description

technical field [0001] The invention relates to hydrological measurement, in particular to a method for monitoring forest land surface runoff and sediment loss. Background technique [0002] At present, there are two methods for monitoring surface runoff and sediment volume in China. One is the traditional method, using cement to build a reservoir and sampling in real time on site. This method has accurate results, but it is not conducive to field operations. If the monitoring point is remote, it is difficult to sample in real time on site. The other is semi-automatic and fully automatic electronic equipment. Semi-automatic equipment monitors more runoff, and real-time sampling is required for sediment content. After comprehensive land preparation, the sediment loss is large, and the tipping bucket measurement is prone to failure; fully automatic electronic monitoring equipment saves labor and time. , Convenient, but electronic equipment needs direct current, it is difficul...

Claims

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Application Information

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IPC IPC(8): G01F1/74G01F1/05G01N33/24
CPCG01F1/05G01F1/74G01N33/24
Inventor 刘跃钧彭小搏姚理武蒋燕锋谢建秋吴应齐梁炜李永和
Owner LISHUI ACAD OF FORESTRY
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