Australian Land Disturbance Database (ALDD) - Biophysical Naturalness

The Australian Land Disturbance Database is an environmental database and a set of modelling procedures which are designed to assist in the planning and management of remote and natural lands in Australia. ALDD survey work is implemented by measuring variation in disturbance across the landscape using four 'indicators': Remoteness from Settlement, Remoteness from Access, Apparent Naturalness and Biophysical Naturalness. \n\nThe distance indicators are derived by weighting primary data (eg roads for access, infrastructure for Apparent naturalness) according to its impact relative to the highest level of impact for this feature type. Then the distance from this 'major impact equivalent' was calculated and thresholds applied.\nBiophysical Naturalness is derived using two methodologies, depending on the nature of land system. For Non-arid, or intensive landuse zone, BN is calculated using grazing, logging and similar available primary data. For arid and semi-arid rangelands, the distance from water, expected domestic stock and palatability of vegetation, form the basis of the assessment.Departmental Deed\nUnrestricted.\nNB. None of the primary data is available for distribution.\nData use agreement must be completed.

澳大利亚土地扰动数据库（Australian Land Disturbance Database，简称ALDD）是一款环境数据库，配套一套标准化建模流程，旨在辅助澳大利亚偏远与自然土地的规划与管理工作。

ALDD的调查工作通过四大“指标”衡量全域景观的扰动变化，具体指标包括：距定居点偏远度、通行可达偏远度、表观自然度（Apparent Naturalness）以及生物物理自然度（Biophysical Naturalness）。

上述距离类指标通过对原始数据按其相对于该特征类型最高影响水平的影响程度赋予权重推导得到：例如以道路作为通行性相关原始数据，以基础设施作为表观自然度相关原始数据。随后计算该“主要影响当量”的空间距离，并应用阈值完成筛选。

生物物理自然度的推导需依据土地系统的属性采用两种方法：针对非干旱区域或高强度土地利用区，其值通过放牧、伐木及其他可获取的原始数据计算得到；针对干旱与半干旱牧场，评估的核心依据为距水源的距离、预期家畜活动范围以及植被适口性。

部门契约：无使用限制。
备注：所有原始数据均不得对外分发。
使用前需签署数据使用协议。