青藏高原典型工程区生态功能变化图集（2000、2010、2020）

首先搜集与处理生态系统类型数据、MODIS的NDVI与NPP产品、1：100万土壤属性数据、气象插值与高程等数据，利用修正的通用土壤流失方程（RUSLE）计算土壤水蚀量，并通过生态系统在极度退化条件下的土壤侵蚀量与现实侵蚀量的差值计算水土保持物质量。采用降水贮存量法估算森林、草地生态系统的水源涵养量；通过净生态系统生产力（NEP）量化生态系统固碳量，由净初级生产力（NPP）减去异氧呼吸消耗得到。依据上述过程做出近20年（2000-2020年，每10年一期）三江源生态保护和建设工程区生态功能图，包含水源涵养、土壤保持与碳固定数据集三部分。数据时间分辨率10年，空间分辨率1000m，可满足青藏高原典型工程区高精度生态系统评估研究需求。

First, collect and process data including ecosystem type data, MODIS NDVI and NPP products, 1:1,000,000 soil attribute dataset, meteorological interpolation results and elevation data, etc. The soil water erosion amount is calculated using the Revised Universal Soil Loss Equation (RUSLE), and the soil and water conservation amount is derived from the difference between the soil erosion amount under extreme ecosystem degradation conditions and the actual erosion amount. The precipitation storage method is adopted to estimate the water conservation capacity of forest and grassland ecosystems. The ecosystem carbon sequestration is quantified by Net Ecosystem Productivity (NEP), which is calculated as Net Primary Productivity (NPP) minus heterotrophic respiration. Based on the above processes, ecological function maps of the Sanjiangyuan Ecological Protection and Construction Project Area over the past 20 years (2000-2020, with a 10-year interval) are developed, which consist of three datasets: water conservation, soil conservation and carbon sequestration. The datasets have a temporal resolution of 10 years and a spatial resolution of 1000 m, which can meet the research demands of high-precision ecosystem assessment in typical project areas of the Qinghai-Tibet Plateau.

搜集汇总

背景与挑战

背景概述

该数据集提供了青藏高原典型工程区（以三江源生态保护和建设工程区为主）在2000、2010和2020年的生态功能变化图集，包含水源涵养、土壤保持和碳固定三个关键生态功能指标。数据基于多源遥感与地面数据，通过RUSLE方程、降水贮存量法和NEP计算等方法生成，时间分辨率为10年，空间分辨率为1000米，适用于高精度生态系统评估研究。数据集以开放获取方式共享，旨在支持青藏高原生态环境监测与保护决策。