7 Groundwater
7 GROUNDWATER ...... 115
7.1 GROUNDWATER: MAIN POINTS...... 116 7.2 INTRODUCTION TO GROUNDWATER IN NORTHLAND ...... 117 7.3 REGIONAL POLICY STATEMENT OBJECTIVES ...... 117 7.4 GROUNDWATER ISSUES...... 117 7.5 PRESSURES AFFECTING GROUNDWATER QUALITY AND QUANTITY...... 118 7.5.1 Groundwater Takes ...... 118 7.5.2 Installation/Construction of Bores...... 121 7.5.3 Land Use Change ...... 122 7.6 STATE OF GROUNDWATER IN NORTHLAND ...... 123 7.6.1 Assessment of Groundwater Resource Characteristics ...... 123 7.6.2 Groundwater Quantity...... 126 7.6.3 Groundwater Quality...... 130 7.7 RESPONSE TO GROUNDWATER ISSUES ...... 134 7.7.1 Northland Regional Council...... 134 7.8 CASE STUDY: AUPOURI AQUIFER SUSTAINABLE YIELD GROUNDWATER MODELLING STUDY ...... 137
115
Northland Regional Council State of the Environment Report 2002
7.1 Groundwater: Main Points
Pressures