TOPIC 1

• DENR Memorandum Circular No. 2008-05:

  “Guidelines in the Preparation of Integrated Watershed Management

  Plans”
• FMB Technical Bulletin No. 16 (2015):

  “Supplemental Guidelines and Procedures in the Preparation of

  Characterization Reports Cum Vulnerability Assessment and

  Integrated Watershed Management Plans Using Geographic

  Information Systems (GIS) and Remote Sensing”
• FMB Technical Bulletin No. 16-A (2019):

  “Revised Supplemental Guidelines and Procedures of Watershed

  Characterization and Climate Resilient Vulnerability Assessment of

  Watersheds and Preparation of Integrated Watershed

  Management Plan”
• Basic Parts of the Watershed Profile

  Geographic and Administrative Profile

  Geophysical Profile

  Bioecological Profile

  Demographic Profile

  Socio-economic Profile

  Land Capability Analysis

  Stakeholder Analysis

  Vulnerability and Risk Analysis

  Situational Analysis
• Geographic and Administrative Profile

  • Geographic Location

  • Sub-basins

  • Administration
• Geophysical Profile

  climate

  topography

  geomorphometry

  soil

  • Geology

  • Mineral Resources

  • Water Resources

  • Land Cover

  • Natural Hazards
• Topography need information?

  elevation and slope
• Soil

  • Soil Series

  • Soil Texture and Structure

  • Permeability and Internal Drainage

  • Soil Fertility and Chemical Properties

  • Soil Erosion
• Soil texture

  • relative

  proportions of the various

  size groups of primary soil

  particles
• Soil structure

  -aggregation of the primary

  soil particles into

  compound particles or

  clusters of primary

  particles
• Permeability -the

  quality of soil that

  enables it to transmit

  water or air.
• Internal soil drainage - the quality of a soil

  that permits the

  downward flow of

  excess water
• Soil Erosion and Soil Erodibility

  Identify priority areas requiring immediate attention

  Evaluate suitability of land uses and effectiveness of

  conservation strategies
• Pyroclastic rock from volcanic eruption may affect the infiltration and percolation of water
• ashfall and pumice fall deposits, and sandstone; some are intercalated with volcaniclastic deposits are

  considered as good aquifers because of their high porosity and permeability
• limestones are considered a good

  aquifer but are prone to pollution

  that could be caused by humans

  and animals
• andesite and basaltic andesite lava flows are considered as poor aquifers because of their lack of porosity and permeability
• Ground fissures such as faults and

  fractures act as pathways for

  groundwater. These become

  important groundwater conduits and

  reservoirs in areas where the bedrock

  has low porosity and poor
•  occurrence or frequency of earthquakes in a region?

  seismicity
• geology needed information?

  geologic origin, fault, seismicity, and volcanoes
• three information need for mineral resources?

  metallic mineral resources, non-metallic resources, mining tenements
• small miners are more destructive than the big miners
• DENR AO 7942. This Act shall be known as the "Philippine Mining Act of 1995." All mineral resources in public and private lands within the territory and exclusive economic zone of the Republic of the Philippines are owned by the State.
• EMB means?

  environmental management bureau
• Surface water resources are classified by EMB
• stream types?

  ephemeral, intermittent, perennial
• Groundwater Resources

  • is the extent and productivity of aquifers in

  the watershed
• demand/supply for water in the past years and current?

  current trends
• it is the projected demand for water?

  future trends
• water resources include surface water resources, ground water resources, current trends, future trends
• Land Classification

  • Discuss the extent of Alienable and Disposable Lands (A&D)

  and forestlands in terms of area coverage within the

  watershed.
• natural hazards is divided into 3:?

  geologic, hydrometeorological, slow-onset
• natural hazard as geologic?

  earthquake, volcanic eruption, tsunami, liquefaction, landslide
• natural hazard as hydrometeorological?

  flood, storm surge, drought
• natural hazard as slow-onset?

  soil erosion and land subsidence