TOPIC 1.1

• three types of streams

  ephemeral, intermittent, perennial
• largest river basin on Philippines

  Cagayan River Basin
• More than what of total land area of the Philippines are watersheds?

  90%
• first town that adopted watershed unit for updating of CLUP with LCCAP and DRRMP, and for updating/preparation of other LGU mandated plans (e.g., FLUP, ADP, Tourism)

  General Nakar, Quezon
• a province the first province that adopted watershed as unit for LCCAP and DRRMP preparation

  Aurora
• the first province that adopted watersheds as unit for preparing CLUPs and Provincial Physical Framework Plan

  Lanao Del Norte
• WRMB means?

  water resource management board
• two types of zoning?

  strict protection and production
• One of primary functions of watershed is to capture rainwater for storage underground. t/f?

  true
• Primary tasks of a watershed manager is to regulate the balance of water (available and stored). t/f?

  true
• refers to all water accumulating on the ground surface

  surface water
• refers to water stored below ground surface

  groundwater
• Two Types of Water Resources in a Watershed

  surface water and groundwater
• Global Freshwater __% Not Accessible __% Accessible

  87 and 13
• what are the services on the importance of watershed?

  provisioning, regulating, cultural, supporting
• WATERSHED

  A topographically delineated area drained by a river system with a single outlet
• • Main function of a watershed is to capture rainwater ideally for storage underground
• Each watershed is separated from adjacent watersheds by a topographic boundary or barrier such as a ridge, hill or mountain, known as DIVIDE
• Watershed boundary or divide partitions the rainwater between two adjacent watersheds
• is also a geologic divide that partitions water penetrating the ground surface---also called PHREATIC DIVIDE
• Ephemeral streams have water only when it is raining
• • Intermittent streams have water only during rainy or wet season
• • Perennial streams have water all year round
• A watershed is made up of many smaller watersheds called SUBWATERSHEDS
• The smallest subwatershed is one that has only one unbranched stream
• Unbranched stream called FIRST ORDER STREAMS has no other stream feeding it
• a watershed that is less than 1000 ha?

  catchment
• The smaller the watershed the more sensitive it is to changes in climate, land cover, and land use and other human activities? t/f

  true
• Small Watershed with area 1,000 ha to 10,000 ha
• Medium Watershed has area 10,000 ha to 50,000 ha
• Large Watershed 50,000 ha to 100,000 ha
• Watersheds with area >100,000 ha?

  river basins
• • Largest watershed in the Philippines with almost 3M ha in area

  • It is covered in large proportion by 8 provinces

  • It is bounded by 3 largest mountain ranges in the country (Sierra Madre in the east, Caraballo in the south and Cordillera in the west)?


  Cagayan River Basin
• • Most subwatersheds drain to Lake Lanao that drains to Iligan Bay

  • Supports hydroelectric power generation

  • Mostly inside ARRMM?

  Agus River Basin
• • With vast industrial agricultural production areas

  • Supplies water to Cagayan de Oro and suburbs

  • Drains to Cagayan de Oro Bay

  • Like many other river basins, it supplies plenty of rich sediment materials to coastal area forming deltas?

  Tagoloan River Basin
• • Straddles 3 provinces

  • Important source of water for irrigation of vast agricultural areas

  • With less than 10% forest cover

  • Perennially suffers from severe flooding

  • Drains to San Miguel Bay?

  Bicol River Basin
• CLUP means COMPREHENSIVE LAND USE PLAN
• LCCAP means Local Climate Change Action Plan
• NDDRMP means Disaster Risk Reduction and Management Plan
• Watershed consists of interconnected ecosystems that provide many ecosystem services