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Fine simulation test method of water erosion process in different landform units in small watershed

A simulation test and test method technology, which is applied in the fine simulation test field of water erosion process in different geomorphic units in small watersheds, can solve problems such as inadequacies, and achieve the effects of simple operation, mutual correction of manual measurement and automatic measurement, and improvement of measurement accuracy

Active Publication Date: 2016-10-26
YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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  • Application Information

AI Technical Summary

Problems solved by technology

Existing watershed-scale simulation experiments only observe the flow and sediment process of the tributaries and main ditches in the watershed. However, the erosion and sediment production in the watershed is a complete hydrological-hydraulic system composed of the erosion and sediment transport process that occurs on slopes and ditches. It is not enough to carry out the simulation research of slope erosion only, or conduct experimental research on slope erosion and channel erosion as two isolated processes

Method used

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  • Fine simulation test method of water erosion process in different landform units in small watershed
  • Fine simulation test method of water erosion process in different landform units in small watershed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Form a model watershed for a fine simulation test of the water erosion process that meets the requirements of system similarity with the prototype watershed, and arrange the test device; firstly, take soil from the field according to the test requirements, fill the soil with 1m without sieving, and place it in the test soil tank for drilling Crushed filling, compaction and control of soil dry bulk density at 1.42 / cm 3 ;

[0025] 2) Then, fill the model topsoil, sieve the fetched soil, fill in layers, compact and control the soil bulk density;

[0026] 3) Secondly, select a relatively complete slope, use white iron piggies to form runoff plots with a width of 1m, and erect a measuring bridge next to the runoff plots to observe the water erosion process on the slope;

[0027] 4) Again, install a downspray rain device (TSJY-1, Nanjing Tusheng Data Engineering Co., Ltd.) above the model to simulate rainfall of different durations, different intensities, and different ra...

Embodiment 2

[0035] 1) Form a model watershed for a fine simulation test of the water erosion process that meets the requirements of system similarity with the prototype watershed, and arrange the test device; firstly, take soil from the field according to the test requirements, fill the soil with 1m without sieving, and place it in the test soil tank for drilling Crushed filling, compaction and control of soil dry bulk density at 1.59g / cm 3 .

[0036] Following steps are with embodiment 1.

Embodiment 3

[0038] 1) Form a model watershed for a fine simulation test of the water erosion process that meets the requirements of system similarity with the prototype watershed, and arrange the test device; firstly, take soil from the field according to the test requirements, fill the soil with 1m without sieving, and place it in the test soil tank for drilling Crushed filling, compaction and control of soil dry bulk density at 1.50g / cm 3 .

[0039] Following steps are with embodiment 1.

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Abstract

The invention relates to a basin-scale water-erosion fine simulation simulation test method which is used to systematically research soil erosion process and mechanism of a small-basin different-landform unit. According to the method, especially, different landforms can be constructed according to test requirements, soil with different particle sizes is used to fill the landforms, the soil bulk density of different-landform positions of the basin is artificially controlled, water-soil conservation measures are laid on different-landform positions (the upper part of a slope surface, the lower part of a slope surface, ditches and the like) of the basin, different rainfall intensity and rainfall processes are controlled, the hydrodynamics characteristics of a water flow at different-landform positions are observed, so that precise simulation of a water and soil loss process of the basin under different site conditions and different rainfall conditions is realized, and influence and response mechanism of various factors on the soil water-erosion process under different underlying surface conditions are researched.

Description

technical field [0001] The invention relates to a watershed-scale fine water erosion simulation test method for systematically studying the process and mechanism of soil erosion in a small watershed, especially capable of filling different landforms according to the test requirements, filling soil with different particle sizes, and artificially controlling different landform parts of the watershed The bulk density of the soil, the deployment of water and soil conservation measures for different geomorphic parts of the watershed (upper slopes, lower slopes, and ditches), control the intensity and process of rainfall, and observe the hydrodynamic characteristics of water flow in different geomorphic parts, so as to achieve different site conditions, Accurate simulation of water and soil loss in the watershed under different rainfall processes, and study the influence and response mechanism of various factors under different underlying surfaces on the soil water erosion process. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
Inventor 姚文艺王玲玲李勉孙维营申震洲孔祥兵焦鹏杨春霞肖培青王昌高杨二杨吉山
Owner YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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