Coastal saline-alkali soil improvement method based on physical salt elimination
A saline-alkali land and physical technology, applied in the field of saline-alkali soil improvement, can solve the problems of long cycle, high cost and easy repetition of bioremediation measures
Inactive Publication Date: 2021-04-27
HOHAI UNIV
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Problems solved by technology
Among them, traditional physical improvement measures require a large amount of engineering and cost; chemical improvement measures may have irreversible effects on soil and groundwater; bioremediation measures have a long period and are easily repeated.
Method used
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[0028] The present invention will be further described below in conjunction with the accompanying drawings.
[0029] figure 1 It shows a schematic cross-sectional view of a coastal saline-alkali land improvement method based on physical salt removal disclosed by the present invention when it is implemented in a certain coastal saline-alkali land. The steps to improve the coastal saline-alkali land are as follows:
[0030] Step 1: First, level the coastal saline-alkali land, cut heights and lay low to make the surface flat, with a flatness of at least ±10cm, and remove some abandoned structures; in the direction perpendicular to the coastline, drill holes to investigate the depth of the underground salt water line.
[0031] Step 2: Excavate the water storage canal 4 on the side of the coastal saline-alkali land about 1 km away from the coastline, the water storage canal 4 is parallel to the coastline; the bottom elevation of the water storage canal 4 is slightly higher than th...
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The invention discloses a coastal saline-alkali soil improvement method based on physical salt elimination. A water storage channel is arranged at the side far away from a coastline, a transverse salt elimination seepage pipe and a vertical salt elimination seepage pipe are buried in saline-alkali soil, a light well point and a water pump are arranged at the side close to the coastline, water irrigation, water drainage, ploughing and other operations are included, and physical salt elimination is carried out by utilizing a seepage theory; and the method integrates the advantages of storing fresh water on the saline-alkali soil for leaching, water drainage and salt leaching and salt drainage through the seepage pipes into a whole. Compared with a traditional saline-alkali soil physical improvement method, the method has the advantages that engineering is easy, soil dressing is not needed, and the salt elimination period is short; and meanwhile, the method can be combined with organic matter fertilizer and other chemical methods and can also serve as an early-stage measure of bioremediation, and the balance of speed and economy is achieved.
Description
technical field [0001] The invention relates to a method for improving coastal saline-alkali land based on physical salt removal, and belongs to the technical field of saline-alkali soil improvement. Background technique [0002] Due to population growth and economic construction, the conflict between man and land in coastal areas has become increasingly acute. Coastal flats are important reserve land resources in coastal areas, and siltation-promoting reclamation is one of the main ways to increase land resources in coastal areas. In the past few decades, large-scale reclamation activities have been carried out in coastal areas, providing a large amount of land for the local area. However, the high salinity content of these tidal flats seriously restricts the development and utilization of these lands. It is of great practical significance to desalinate and dealkali the newly reclaimed tidal flat land. [0003] At present, the improvement of saline-alkali land mainly inc...
Claims
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IPC IPC(8): A01B79/02
CPCA01B79/02
Inventor 陈大可张弛郑金海陈立华李方明华厦段渊译
Owner HOHAI UNIV