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Global Assessment of Hydrologic Alteration (Grill et al. 2019)
Global-scale assessment mapping the degree of flow regulation and hydrological alteration across 12 million river kilometres worldwide. Published in Nature, this study found... -
Pairwise IHA Analysis: Python Toolkit for Assessing Reservoir Impacts
Python-based tool for pairwise upstream-downstream IHA analysis at reservoirs and dams. Enables comparison of flow regime characteristics above and below impoundments to... -
IHA R Package: Indicators of Hydrologic Alteration Implementation
Open-source R package implementing the full Indicators of Hydrological Alteration (IHA) methodology for reproducible, scriptable analysis. Provides functions for calculating all... -
Ecological Reserve Determination and Compliance Monitoring: Crocodile River Catchment
Reserve determination and compliance assessment for the Crocodile (West) River using IHA-based flow analysis. Documents recommended ecological flows based on the Building Block... -
Understanding Hydrological Processes at Ungauged Points in the Incomati...
Application of the IHA methodology to 33 gauging stations across the Incomati (Inkomati) River Basin in South Africa. Analyses streamflow variability and identifies... -
The Ecological Limits of Hydrologic Alteration (ELOHA): A New Framework...
Framework for developing regional environmental flow standards that scales the IHA approach from individual sites to entire regions. ELOHA consists of four steps: (1)... -
The Natural Flow Regime: A Paradigm for River Conservation and Restoration...
Landmark paper establishing the natural flow regime as the central paradigm for river conservation and restoration. Identifies five critical components of flow regime —... -
How Much Water Does a River Need? The Range of Variability Approach (Richter...
Key companion paper to the 1996 IHA methodology introducing the Range of Variability Approach (RVA) for setting streamflow-based river ecosystem management targets. Defines a... -
A Method for Assessing Hydrological Alteration within Ecosystems (Richter et...
Foundational scientific paper introducing the Indicators of Hydrological Alteration (IHA) methodology. Presents 32 hydrological parameters (later expanded to 33) organised in 5... -
GRDC: Global Runoff Data Centre
The Global Runoff Data Centre (GRDC), operated by the German Federal Institute of Hydrology (BfG) under the auspices of the World Meteorological Organization (WMO), maintains... -
CHIRPS: Climate Hazards InfraRed Precipitation with Station Data
CHIRPS is a quasi-global rainfall dataset spanning from 1981 to the present, covering 50°S to 50°N at 0.05° (~5 km) spatial resolution. Produced by the Climate Hazards Center at... -
HydroATLAS: Global Hydro-Environmental Sub-Basin & River Reach Data
HydroATLAS is a global compendium of hydro-environmental attributes for all sub-basins and river reaches worldwide, providing 56 hydro-environmental variables organised in 281... -
SASS5 Rapid Bioassessment Method for Rivers
The South African Scoring System version 5 (SASS5) is the standardised national protocol for rapid biological assessment of river health using aquatic macroinvertebrates as... -
Water Resources of South Africa 2012 Study (WR2012)
The most comprehensive water resources assessment for South Africa, commissioned by the Water Research Commission (WRC). WR2012 covers 1,995 quaternary catchments with patched... -
River EcoClassification Manual for EcoStatus Determination
The DWS River EcoClassification system provides a standardised framework for determining the Present Ecological State (PES) and Ecological Importance & Sensitivity (EIS) of... -
Building Block Methodology (BBM) for Environmental Flow Assessment
The Building Block Methodology is a holistic environmental flow assessment method developed in South Africa that decomposes the natural flow regime into ecologically meaningful... -
DWS Hydrological Services & National Gauging Station Network
The Department of Water and Sanitation (DWS) Hydrology directorate operates approximately 3,000 flow gauging stations across South Africa. Provides daily discharge data, water... -
eBioNet Course 1 Brochure — Getting Started with eBioNet (EN/PT, Dec 2025)
Promotional brochure for the first eBioNet online course "Getting Started with eBioNet". Available in English and Portuguese. Covers course overview, learning objectives, target... -
TBLN Meeting 1 Report — Maputo, Mozambique (May 2025)
Report from the first meeting of the Transboundary Learning Network (TBLN), held in Maputo, Mozambique in May 2025. Documents discussions on transboundary freshwater... -
Mozambican Biodiversity Data Collection Report (December 2025)
Findings from freshwater biodiversity data collection expeditions in the Mozambican portion of the Incomati River basin. Documents species records collected, sampling sites,...