Ecological Risk Of Travertine Landscape In Xuebaoding Watershed Research On Evaluation And Regulation

In recent years,the frequent occurrence of sudden geological disasters such as earthquake and debris flow,the degradation and blackening of travertine landscape and serious desertification in Huanglong Jiuzhaigou scenic spot have damaged the environment of the ecologically sensitive area of Jiuzhaigou Huanglong scenic spot,resulting in damage to the whole ecosystem.In order to deeply reveal the change principle of landscape resources in Huanglong Jiuzhaigou scenic spot,find out the trigger mechanism of this phenomenon,realize the sustainable utilization of tourism resources,explore the ecological status of travertine landscape in Huanglong Jiuzhaigou scenic spot,evaluate its ecological risk,and reveal the characteristics of surrounding environmental changes of travertine core landscape in Huanglong Jiuzhaigou scenic spot and its impact on travertine core landscape.The paper mainly includes:(1)according to the actual geographical environment conditions of the study area,through the previous research basis and the previous accumulated results of the research group,this paper studies the complex problems of the risk influencing factors of travertine landscape in Huanglong Jiuzhaigou,analyzes the influence degree of each factor on the health of travertine landscape in Huanglong Jiuzhaigou scenic spot through Yaahp software and maltab mathematical statistics software,and ranks and compares them,Find out the main factors affecting the health of travertine landscape in Huanglong Jiuzhaigou scenic spot;(2)Construct the ecological risk assessment system of travertine landscape in Huanglong Jiuzhaigou.Using analytic hierarchy process to calculate the weight,comprehensively calculate the ecological risk evaluation results of travertine landscape in Huanglong Jiuzhaigou scenic spot,and finally complete the ecological risk evaluation of travertine landscape in the study area;(3)According to the research results,the temporal and spatial variation characteristics of vegetation coverage and the change of calcite saturation index for many years are selected to explore the development trend of travertine landscape degradation and evolution in Huanglong scenic spot,so as to provide guidance for its healthy regulation and management.The conclusions are as follows:(1)the evaluation index system of Jiuzhaigou Huanglong travertine landscape is constructed by analytic hierarchy process;It is found that the core travertine landscape of Jiuzhaigou has been seriously damaged.The risk of Huanglong travertine is low in other areas except Huanglongdong in the upper reaches of Huanglong Valley and Yingbin Caichi group in the lower reaches of Huanglong Valley;(2)The vegetation coverage of Huanglong scenic spot is good.The vegetation types in the study area are mainly medium and high vegetation coverage,and the vegetation distribution characteristics show a trend of low in the West and high in the East.Among them,high vegetation coverage occupies the dominant position,which is mainly distributed in the undeveloped virgin forest area in the East.The intensity of human activities is low and has little impact on the growth and development of vegetation.Over the years,the vegetation coverage of Huanglong scenic spot is the largest in the stable area,which shows that the ecological environment of Huanglong scenic spot can maintain its own ecological environment from being greatly affected by human and natural factors and has the ability of self-regulation;(3)Most travertine landscapes in Huanglong area show a state of weak erosion,and Travertine Deposition and weak erosion are in a process of dynamic balance.The strong erosion area of travertine landscape in Huanglong scenic area is mainly concentrated in the area of Huanglong cave in the upper reaches of Huanglong ditch and Yingbin Caichi group in the lower reaches.The travertine system is in an unsaturated state,and the dissolution phenomenon of travertine appears,forming a travertine funnel area,which has caused serious damage to the travertine landscape in this area,resulting in the desertification of travertine,the drying and blackening of travertine Caichi,The travertine landscape deposition area of Huanglong scenic spot is mainly concentrated in the area from transforming spring to wucaichi and the section from Zhengyan Caichi to Jinsha Pudi.The travertine system is in a saturated state,forming Ca CO₃ precipitation from karst water.Travertine landscapes such as travertine color pool and beach flow are all over the area.