Saline-alkali soil irrigation and drainage ecological improvement method

A saline-alkali land and ecological technology, applied in the field of ecological improvement of saline-alkali land irrigation and drainage, can solve problems such as uneven soil salt leaching, uneven infiltration of leaching water, and changes in soil hydraulic characteristics, so as to improve the social ecological environment and improve improvement efficiency and effect, the effect of realizing the production potential

Active Publication Date: 2011-08-24
TIANJIN TEDA GREEN GRP CO LTD
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Problems solved by technology

However, studies have shown that conventional open and dark drainage changes the hydraulic characteristics of the soil, resulting in un

Method used

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  • Saline-alkali soil irrigation and drainage ecological improvement method
  • Saline-alkali soil irrigation and drainage ecological improvement method
  • Saline-alkali soil irrigation and drainage ecological improvement method

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Embodiment 1

[0020] Take Tianjin coastal saline-alkali land ecological greening project as an example. Specifically, it includes drainage and salt discharge system construction, water supply system construction, irrigation and leaching, vegetation construction and maintenance, etc.

[0021] In this example, the distance between the soil suction pipes is 9m, the buried depth is 1.2m, the pipe diameter is 0.06m, and the slope is 1‰; the buried depth of the water collection pipe is 1.3m, the pipe diameter is 0.11m, the slope is 1‰; The depth is 0.1m shallower than the bottom of the suction pipe, the width of the blind ditch is 0.6m, the height of the upper mouth of the blind ditch is 0.9m lower than the ground surface, the slope is 1‰, and four plots are divided by irrigation and leaching.

[0022] Drainage and salt discharge system construction: such as figure 1 As shown, mechanically or manually level the site, measure and set out; excavate the suction pipe ditch, water collection pipe dit...

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Abstract

The invention relates to a saline-alkali soil irrigation and drainage ecological improvement method, comprising two parts, namely a composite gridded underground drainage brine discharging system and a water-saving irrigation washing system. The composite gridded underground drainage brine discharging system is formed by the way that a gridded drainage brine discharging network composed of a water absorption tube (branch drain pipe) and a blind drain is arranged below a saline-alkali soil layer, and salty underground water and washing influent seepage are discharged outside an improved region by virtue of two paths, namely the blind drain, the water absorption tube (the bran drain pipe), a collector pipe (main drain pipe) and the water absorption tube as well as the collector pipe; and the water-saving irrigation washing system is in charge of washing salinity in soil by adopting one or more than two measures of partition irrigation, estuarine rotation irrigation and intermittent irrigation. By adopting the method provided by the invention, the saline-alkali soil can be uniformly and efficiently improved, water resource can be saved, improvement time can be reduced, and better social, ecological and economic benefits can be achieved.

Description

technical field [0001] The invention relates to a saline-alkali land improvement technology, in particular to a saline-alkali land irrigation and drainage ecological improvement method. Background technique [0002] "Salt comes with water, salt goes with water", irrigation, leaching and drainage are important measures for saline-alkali soil improvement. At present, the commonly used irrigation and leaching improvement methods are high water pressure salt and rice washing salt, which have the disadvantages of large water consumption and low leaching efficiency. Conventional drainage methods such as open drainage and concealed drainage can better control the groundwater level and discharge seepage water. However, studies have shown that conventional open and dark drainage changes the hydraulic characteristics of the soil, resulting in uneven infiltration of leaching water at various points on the ground, uneven leaching of soil salt, and serious waste of water resources. Co...

Claims

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Application Information

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IPC IPC(8): A01B77/00
Inventor 张金龙张清王振宇
Owner TIANJIN TEDA GREEN GRP CO LTD
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