基于卫星图像的热带气旋对LULC和植被的影响评估:气旋Biparjoy的案例研究
Prachee Patra1, Umakanta Das1, Sonam Agrawal2
1GIS Cell, Motilal Nehru National Institute of Technology Allahabad, Prayagraj, 211004, Uttar Pradesh, India.
Environmental monitoring and assessment
|July 18, 2024
概括
印度古吉拉特邦 (Gujarat),风比帕乔伊 (Biparjoy) 引发了大范围的洪水,淹没了超过6,600平方公里,影响了裸露的地面,牧场和耕地. 该研究使用卫星图像评估了包括红树林在内的生态损害.
科学领域:
- 地球和环境科学 地球和环境科学
- 遥感 遥感 遥感 遥感
- 灾害管理 灾害管理
背景情况:
- 旋风是对沿海生态系统和水文学的重大威胁.
- 风Biparjoy于2023年6月16日在印度古吉拉特州海岸登陆.
- 由于极端天气事件,沿海地区面临着重大的生态和水文变化.
研究的目的:
- 评估风比帕乔伊在印度古吉拉特州造成的洪水影响和植被损害.
- 绘制洪水范围的地图并确定受影响的土地覆盖类型.
- 评估对植被和红树林生态系统的生态影响.
主要方法:
- 使用 Sentinel-1A (VV极化) 图像进行洪水划分.
- 使用Landsat-8 OLI图像来使用NDVI和EVI评估植被健康.
- 使用ROC曲线验证的图像分类准确性 (93.2%的前和89.5%的后旋风).
主要成果:
- 总被洪水淹没的面积:卡奇的6556.73平方公里和Devbhoomi Dwarka的104.49平方公里.
- 最受影响的LULC类在Kachchh:赤裸的地面 (38.95%) 和牧场 (38.94%).
- 在达瓦卡最多的水淹没:农田 (33.04%).
- 评估了科里溪对植被密度和红树林树木的生态影响.
结论:
- 气旋Biparjoy在古吉拉特邦造成了重大的水文变化和生态影响.
- 卫星遥感对于评估风引起的洪水程度和植被损害是有效的.
- 了解这些影响对于灾难准备和生态保护工作至关重要.
相关概念视频
Responses to Drought and Flooding
10.6K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.6K
Light Acquisition
8.4K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
8.4K
Applications of GIS: Disaster Management and Emergency Response
65
Geographic Information System (GIS) technology is essential for risk identification, action prioritization, and resource optimization in critical situations like flooding and earthquakes. By integrating spatial and demographic data, GIS provides a comprehensive framework for emergency response.GIS integrates data layers, like rainfall intensity, topography, elevation profiles, and river levels, to model high-risk flood zones. These layers assess areas susceptible to flooding based on their...
65
Adaptations that Reduce Water Loss
25.4K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.4K
What is Climate?
18.4K
Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
18.4K


