Study On Regional Agriculture Water And Soil Environment Characteristics And Its Effect On System Resilience

Jiansanjiang Administration has a flat terrain,fertile soil,suitable climate and abundant water resources.Its natural conditions are more suitable for the development of agriculture.It is an indispensable food reserve base and commodity grain production base in China.However,with the development of economy,increasing population,and climate change,the stability and development of the agricultural water and soil resources system of the Jiansanjiang Administration has been significantly affected,with a series of water and soil pollution,a drastic decrease in the total amount of water resources,and a serious phenomenon of desertification.Environmental and ecological problems have directly led to the imbalance in the development of agricultural water and land resources systems.The outlook is not optimistic.The construction of the Sanjiang River Administration Bureau caused problems such as overexploitation of groundwater,abrupt land composition,serious environmental pollution,and unreasonable allocation of land and water resources.In view of the problems existing in the development and utilization of land and water resources of the Jiansanjiang Administration,this paper takes the 15 farms under the Jiansanjiang Administration as an example to evaluate the assessment of the restoration capacity of agricultural water and soil resources in 2016 and analyze the spatial differences.To further study the Jiansanjiang Administration’s agricultural land and water resources resilience measurement analysis method,reveal the spatial distribution law of its resilience,complete the drive mechanism analysis,and provide theoretical support and policy guidance for the sustainable and efficient use of regional water and land resources.The main research contents and achievements of this article are as follows:（1）This paper evaluates the groundwater quality of the Jiansanjiang River Management Bureau in 2016 based on the F-value method,the standard,and the improved Nemero index method.The results show that the overall water quality of the Jiansanjiang Authority is moderate,and water quality gradually deteriorates from southwest to southeast.（2）Based on the comprehensive index quality evaluation model,this paper uses the weighted average superposition index method,the Nemerow index method,and the weighted superposition index method to evaluate the soil quality of Jiansanjiang Administration in 2016.The results showed that the moderately polluted and heavily polluted areas were mainly distributed in the northern part of the study area,while the urban areas in the southern part of the study area were less polluted.（3）This paper selects the model according to the evaluation index system,and applies the DPSIR model under the principles of operability,systemicity,hierarchy,and regionality.The rainfall X₁,population X₂,population growth X₃,and total social output X₄ are optimized.Agricultural film usage X₅,pesticide application quantity X₆,million yuan GDP energy consumption X₇,cultivated land irrigation rate X₈,per capita water resource X₉,comprehensive soil quality index X₁₀,comprehensive water pollution index X₁₁,per capita GDPX₁₂,proportion of cultivated land area X₁₃,water supply Modulus X₁₄,eco-environmental water use rate X₁₅,forest coverage rate X₁₆,soil erosion control rate X₁₇,industrial water reuse ratio X₁₈,18 impact factors.（4）Based on the evaluation index system of the resilience of agricultural land and water resources that has been established,this paper adopts the projection pursuit model（FA-PP model）based on the firefly algorithm and the projection pursuit model（RAGA-PP model）based on the accelerated genetic algorithm.The evaluation of agricultural water and soil resource restoration capacity of 15 farms of Sanjiang River Management Bureau in 2016 was conducted.Based on the robustness and reliability of the diagnostic results,a firefly algorithm-based projection pursuit model（FA-PP model）was selected to restore agricultural water and soil resources.The optimal force measurement method is more suitable for assessing the resilience of regional agricultural water resources systems.（5）According to the FA-PP model of optimal restoration force measurement method,combined with ArcGIS spatial data analysis technology,draw the spatial variability map of the restoration capacity of agricultural water and soil resources of Jiansanjiang Administration.It shows that the resilience of the agricultural water and soil resources system of the Jiansanjiang Administration has generally increased from southeast to southwest.Farms with resilience ratings of Class I and Class II mainly appear in the southwestern part of the Sanjiang Management Bureau,and a small number are scattered.In the north,near the Heilongjiang and Songhua River areas,farms with resilience ratings of Class III and Class IV are located in the middle and southeast of the Jianjiang River Administration Bureau near the Ussuri River.The spatial differences in the resilience of the agricultural water and soil resources system of the Jiansanjiang Administration are mainly due to the uneven spatial distribution of water resources caused by the distribution of rivers and water networks,different levels of economic development,and different levels of water and land resources development and utilization in various regions.（6）Based on the DEMATEL model,analyze the 15 farms of the Jiansanjiang Authority and identify the key drivers that affect the resilience of agricultural water systems in each farm.Among them,the drivers of causes include X₁₀（a comprehensive index of soil quality）,X₁₁（F value of groundwater quality）,X₁₃（ratio of cultivated land）,X₁₇（rate of soil erosion control）,and X₈（irrigation rate of cultivated land）.Factors;The result-driven factors mainly include X₇（ten thousand yuan GDP energy consumption）,X₁₆（industrial water reuse rate）,X₁₅（soil erosion control rate）,X₁₂（per capita GDP）,and X₃（population growth rate）five driving factors.（7）With reference to the water and land resources of the Jiansanjiang Administration,evaluation of water and soil resource resilience,and key driving factors of agricultural water and soil resource system resilience of all farms,the restoration power construction path for water and land resources of the Jiansanjiang Administration is proposed to maintain the agriculture system for each farm.Stability provides the basis for decision making.