Rock-surface runoff collecting method applicable to karst regions and irrigation system

A karst and rock surface technology, which is applied in the field of collection and irrigation systems for rock surface runoff in karst areas, can solve the problems of low efficiency, difficult collection of karst rock surface runoff, and single irrigation method, and achieves the effect of improving efficiency.

Inactive Publication Date: 2018-05-15
INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention combines the characteristics of the region, focuses on the little-concerned rock surface runoff water resources, and solves the problem of difficult collection of karst rock surface runoff
The present invention solves the problem of single irrigation method and low efficiency on karst slope surface, and provides technical means for the full development and rational utilization of limited water resources in such areas

Method used

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  • Rock-surface runoff collecting method applicable to karst regions and irrigation system
  • Rock-surface runoff collecting method applicable to karst regions and irrigation system
  • Rock-surface runoff collecting method applicable to karst regions and irrigation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method suitable for collecting runoff from rock faces in karst areas, the steps of which are:

[0022] The first step is to try to choose well-developed rocks with relatively flat rock surfaces in the exposed rock areas of karst slopes1. Around the top of the rock 1, use cement mortar 3 to build the surrounding water ridge 2, and the surrounding water ridge 2 is about 10 cm high, and the pit on the rock 1 top is filled with cement with cement mortar 3 simultaneously. In the place where the rainwater gathers, an orifice of about 2 cm is opened on the surrounding water ridge 2, so that the rainwater can discharge down along the rock surface after coming out of the orifice.

[0023] The second step is to select the rock face that water flows down, and below the rock face, close to the soil-rock boundary, use cement mortar to build strip cement on the rock face with cement mortar 3, and start building from the left end of the rock face until the right end. The strip ceme...

Embodiment 2

[0027] The applicant conducted an experiment at the Huanjiang Karst Ecosystem Observation and Research Station of the Chinese Academy of Sciences in Huanjiang Maonan Autonomous County, Hechi City, Guangxi from August 2017 to November 2017. In the field, the above method was used to build a rock surface flow collection tank, and the tipping bucket rain gauge was used to Long-term quantitative monitoring of runoff on rock surfaces. By searching the meteorological data of the research station, the rainfall data from August to October can be obtained. Among them, daily rainfall (ml) = daily rainfall mm × rock surface area, collection efficiency = rock face runoff / rainfall. The results are shown in Table 1.

[0028] Table 1 Test data

[0029] date

Rainfall (ml)

Rock surface runoff (ml)

Collection efficiency (%)

17.8.23

32000

5000

15.6

17.8.24

196000

30600

15.6

17.8.25

28800

8700

30.3

17.8.27

8400

1500 ...

Embodiment 4

[0039] according to figure 1 , figure 2 , image 3 , Figure 4 It can be seen that a system suitable for irrigating with rock surface runoff in karst areas includes rock 1, surrounding water ridge 2, cement mortar 3, L-shaped polyvinyl chloride strip 4, silicone glue 5, and the first water outlet 6 , water pipe 7, prefabricated water collection bucket 8, first valve 9, first water inlet 10, second water outlet 11, tarpaulin 12, first polyvinyl chloride round pipe 13, second polyvinyl chloride round pipe 14, stirring Bucket 15, the second water inlet 16, the third water outlet 17, the second valve 18, the prefabricated polyvinyl chloride round pipe 19, and its connection relationship is: around the top of the rock 1, use cement mortar 3 to build the surrounding water ridge 2 , near the soil-rock boundary, use cement mortar 3 to build strips of cement along the surface of the rock 1, and after the cement mortar 3 has a certain plasticity, insert the L-shaped polyvinyl chlori...

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Abstract

The invention discloses a rock-surface runoff collecting method applicable to karst regions and an irrigation system. The method includes the steps of A, searching for a rock with a flat rock surfaceas far as possible in the middle of a mountain, and building a water storage tank on the rock surface with cement mortar; B, laying stripped cement on the rock surface at the rock-soil interface withcement mortar, and parallelly inserting L-shaped polyvinyl chloride strips to form a water holding grooves; connecting holes in the water holding grooves with a water collecting barrel arranged in themiddle of the mountain, placing a stirring barrel on the lower portion of the mountain, and allowing the stirring barrel to be higher than a field, wherein the water collecting barrel is connected with the stirring barrel through a water conveying pipe; D, digging a circular hole in a to-be-irrigated position of the field, inserting a prefabricated polyvinyl chloride circular pipe, filling the gap between the circular hole and the circular pipe with dry branches and fallen leaves, and connecting the stirring barrel and the polyvinyl chloride circular pipe with a water conveying pipe. The rock-surface runoff collecting method has the advantages that the pressure of few surface water sources of a karst slope during irrigation is relieved, the problem that existing slope irrigation is singlein mode and low in efficiency is solved, and slope water and soil loss quantity is reduced to a certain extent.

Description

technical field [0001] The invention belongs to the technical fields of slope hydrology, soil and water conservation and agricultural irrigation, and more specifically relates to a method suitable for collecting rock surface runoff in karst areas, and also relates to a system suitable for irrigating with rock surface runoff in karst areas. It is suitable for guiding the production practice of making full use of limited surface water resources in karst arid areas, and it is also suitable for scientific research and water conservancy departments to conduct systematic measurement and research of slope hydrological processes and water transport under natural and human influences. Background technique [0002] In the karst region of Southwest China, although there is abundant rainfall, the slope soil layer is shallow and has weak water storage capacity, coupled with abundant karst pores and fissure structures, a large amount of surface water leakage, and deep groundwater burial. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E03B3/02E03F5/10E02B13/00
CPCE02B13/00E03B3/02E03F5/10Y02A20/108
Inventor 徐勤学陈洪松李春茂付智勇
Owner INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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