LBA-ECO CD-06 Biogeochemistry of Ji-Parana River and Tributaries, Brazil: 1999-2003

This data set provides spatially extensive and temporally intensive surveys of the river biogeochemistry of the Ji-Parana River Basin in Western Amazonia, Rondonia, Brazil. The concentrations of major nutrient ions, dissolved organic and inorganic carbon, pH, temperature, dissolved oxygen, and conductivity were measured in Ji-Parana River and tributary samples at the defined seasonal or monthly intervals. Dominant landuse/landcover classes, slope, and soil cation exchange capacity are included for each of the extensive sampling locations derived from river basin and sub-basin characteristics.

Water samples were collected from 1999 to 2003 along the main stem of the Ji-Parana River as well as from the major tributaries including the Urupa. Shapefiles with the boundaries of the major sub-basins of the study area as well as the location of the sample collection points are included for the intensive and extensive sampling campaigns as well as the Urupa River campaign.

There are six comma-separated data files (.csv) and five compressed shapefiles (.zip) with this data set.

本数据集针对巴西朗多尼亚州亚马逊西部地区的吉-帕拉纳河流域（Ji-Parana River Basin）开展了大范围空间覆盖、高时间频次的河流生物地球化学调查。研究按预设的季节或月度采样间隔，对吉-帕拉纳河及其支流的水样进行检测，测定指标涵盖主要营养盐离子、溶解性有机碳与无机碳、pH、水温、溶解氧及电导率。所有大范围采样点位的配套数据均包含由流域及子流域特征衍生的优势土地利用/土地覆被类型、坡度及土壤阳离子交换量（soil cation exchange capacity）。

本次采样工作于1999年至2003年间完成，覆盖吉-帕拉纳河干流以及包括乌鲁帕河（Urupa）在内的主要支流。本数据集附带研究区主要子流域边界与采样点位坐标的形状文件（shapefiles），涵盖高时间频次采样、大范围采样以及乌鲁帕河专项采样三类调查任务。

本数据集共包含6个逗号分隔值（CSV）数据文件（.csv）与5个压缩形状文件包（.zip）。