African Monitoring of the Environment for Sustainable Development

African Monitoring of the Environment for Sustainable Development Eco-climatic Condition & Trends on Protected Areas of the IGAD Region Eugene Kayijamahe M. Njoki Kahiu Dev. Co. Cast Training 7 February 2011 – Enchede, The Netherlands

Outline § Objectives & Expected results § Methods n Study area n Input data n Processing q. Overall q. Exercises Dev. Co. Cast Training 7 February 2011, Enchede, The Netherlands

Objectives § To determine whethere has been changes in vegetation growth in IGAD states using rainfall pattern and vegetation indices n Expected output q Defined seasons q NDVI averages (decadal, seasonal, annual) q Rainfall averages (decadal, seasonal, annual) q Seasonal cumulative rainfall estimates § To assess the intra/inter annual trends for vegetation conditions in IGAD region using low resolution vegetation indices n Expected output q Vegetation growth conditions q Seasonal deviations of NDVI from its average q Biomass productivity q Climate change hotspots in PAs (major reduction in vegetation intensity) Dev. Co. Cast Training 7 February 2011, Enchede, The Netherlands

Methods – Study Area § Monitoring the whole of IGAD region. § More emphasis on protected areas >> § Buffer of 25 km will be created for the final analysis. Dev. Co. Cast Training 7 February 2011, Enchede, The Netherlands

Input data DATA PURPOSE SOURCE NDVI Indicator for vegetation growth/cover, and biomass Fewsnet, production. Vgt 4 Africa NGI Actual vegetation conditions with respect to the NDVI expected growth derivative s. NDVI Current standardized gain or loss of vegetation with NDVI respect to the average. derivative NDWI to assess and monitor water content and to detect Vgt 4 Africa drought stress Pcum_RFE Progressive sum of decadal rainfall estimates since FEWSNET_RF rthe start of season and updated every 10 days E Google Earth Very High resolution imagery for validation of some Google Earth of the findings Country IGA D states boundary Local PAs Protected area boundary Local Dev. Co. Cast Training 7 February 2011, Enchede, The Netherlands

Methods – Overall Processing NDVI stats (avg, max, std) Cumulate, calculate Calculate RFE_cumm, NDWI, DMP trends NDVI trends and derivates Overlay with PA, derive statistics Eco-climatic for IGAD and all PAs Dev. Co. Cast Training 7 February 2011, Enchede, The Netherlands RFE, DMP, NDWI

Processing: Exercises § The manual contains exercises on: n EXER 1: Pre-Processing q EXER 1. 1: Sub-setting NDVI images of Africa to IGAD region extent using administration boundaries of IGAD countries q EXER 1. 2: Conversion of byte data to real NDVI values using the formula supplied in the product’s documentation: Real NDVI= raw/250. Dev. Co. Cast Training 7 February 2011, Enchede, The Netherlands

Processing: Exercises ctd… n EXER 2: Calculating the Annual NDVI Averages from 1996 to 2005 as a Determinant of Forage Trends in IGAD PAs q EXER 2. 1: Calculate Average NDVI for Group 1 Countries, Season 1 in 1996 -2005. q Exer 2. 2 Calculate Average NDVI for All PAs, Season 1 of 1996 -2005. Burundi Protected Areas NDVI Trend 1996 to 2005 0, 60 Average NDVI Values Ruvubu 0, 55 Kibira 0, 50 Rusizi 0, 45 Lac Rwihinda 0, 40 Bururi Forest 0, 35 Rumonge 0, 30 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 Dev. Co. Cast Training 7 February 2011, Enchede, The Netherlands

Processing: Exercises ctd… n EXER 3: Calculating Average Rainfall for Season 1 and Aggregating the Values for IGAD PAs as One Explaining Factor for NDVI Trend (2000 -2010) Comparisons with other vegetation products Dev. Co. Cast Training 7 February 2011, Enchede, The Netherlands

Processing: Exercises ctd… n EXER 4: Computing NGI for IGAD region Dev. Co. Cast Training 7 February 2011, Enchede, The Netherlands

Processing: Exercises ctd… n EXER 5: Computing s. NDVI for IGAD region Dev. Co. Cast Training 7 February 2011, Enchede, The Netherlands

Conclusion § Further analysis and interpretation are needed for conclusive results § Process automation Dev. Co. Cast Training 7 February 2011, Enchede, The Netherlands