A three-dimensional spatial distribution simulation method of soil organic carbon in plain areas

A three-dimensional space and distribution simulation technology, applied in the field of soil environment, can solve problems such as the difficulty of comprehensively grasping the overall situation and the difficulty of spatial distribution of auxiliary variables of soil properties

Active Publication Date: 2020-01-07
SICHUAN AGRI UNIV
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Problems solved by technology

Only by simulating the temporal and spatial evolution of surface soil organic carbon, it is difficult to fully understand the overall situation of soil organic carbon changes under the background of high-intensity agricultural activities
At the same time, the commonly used environmental auxiliary factors such as terrain have little difference in the flat terrain area, so it is difficult to be used as auxiliary variables in the simulation and prediction of the spatial distribution of soil properties

Method used

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  • A three-dimensional spatial distribution simulation method of soil organic carbon in plain areas
  • A three-dimensional spatial distribution simulation method of soil organic carbon in plain areas
  • A three-dimensional spatial distribution simulation method of soil organic carbon in plain areas

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Embodiment Construction

[0061] The specific technical solutions of the present invention are described in conjunction with the examples.

[0062] In this example, the core of the Chengdu Plain was selected as the case area, and the three-dimensional spatial distribution simulation of soil organic carbon in this area was carried out with the above scheme. details as follows:

[0063] 1 Data sources and research methods

[0064] 1.1 Overview of the study area

[0065] The study area is located in the core area of ​​the Chengdu Plain, with geographical coordinates between 30°22′-31°50′ north latitude and 103°27′-104°14′ east longitude. The area of ​​the whole area is about 3170km 2 , mainly including the plain areas of 10 districts and counties in Chengdu, including Pengzhou, Xindu, Dujiangyan, Pidu, Wenjiang, Shuangliu, Xinjin, Chongzhou, Dayi and Qionglai. The terrain in the area is generally flat, with an altitude between 447 and 732m, decreasing from northwest to southeast. The river network is...

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Abstract

The invention provides a method for simulating the three-dimensional spatial distribution of soil organic carbon in plain areas, including (1) fitting of the optimal depth function of soil organic carbon profile changes and determination of function parameters; (2) influencing factors of soil organic carbon profile depth function parameters (3) The construction and calculation process of the three-dimensional spatial distribution simulation model. The invention constructs the environmental auxiliary variables for the simulation of the spatial distribution of soil properties in the gentle terrain area, uses the soil depth transfer function and the regression Kriging method, establishes the three-dimensional spatial distribution simulation model of soil organic carbon in the gentle terrain area, and develops the three-dimensional space of the soil organic carbon in the area The research on the distribution simulation method can not only provide a reliable simulation method for accurately grasping the three-dimensional spatiotemporal evolution information of soil organic carbon under the background of high-intensity agricultural use in flat terrain areas, but also provide a basis for accurately estimating regional organic carbon storage and ensuring soil safety and food security. method reference.

Description

technical field [0001] The invention belongs to the technical field of soil environment, and in particular relates to a method for simulating the three-dimensional spatial distribution of soil organic carbon in plain areas. Background technique [0002] Soil organic carbon pool is the largest carbon pool in terrestrial ecosystems. It is estimated that the global 1m deep soil organic carbon storage is about 1500Pg (1Pg=10 15 g), which is more than twice the atmospheric carbon pool (750Pg), and 2-3 times that of the terrestrial vegetation carbon pool. Small changes in soil organic carbon may cause large changes in atmospheric carbon dioxide concentration, thereby affecting global climate change. At the same time, soil organic carbon is also the source of plant mineral nutrition and organic nutrition. The storage and dynamic changes of organic carbon in soil not only directly affect the global carbon cycle, but also are closely related to soil fertility, agricultural product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06T17/05G06F16/29
CPCG06T17/05G06F16/29G06F30/20
Inventor 李启权李艾雯方红艳李珊赵彬王昌全袁大刚高雪松李冰李一丁
Owner SICHUAN AGRI UNIV
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