Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

NRC 170 First Exam > Lecture IA: General Introduction > Flashcards

Lecture IA: General Introduction Flashcards

1
Q

define

topographically delineated area drained by a river system with a single outlet

A

watershed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

a watershed is a land area drained by a ________ or fixed body of water and its ________ having a common outlet for _________ ___-___.

A

a watershed is a land area drained by a stream or fixed body of water and its tributaries having a common outlet for surface run-off

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

classification of watersheds (sizes)

A
  • micro catchment/catchment (less than 1,000 ha)
  • small watersheds (1,000 ha to 10,000 ha)
  • medium scale watershed (10,000 ha to 50,000)
  • large scale watershed (50,000 ha to 100,000 ha)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

true or false

a small watershed has an area of more than 10,000 ha to 50,000 ha

A

false

a MEDIUM watershed has an area of more than 10,000 ha to 50,000 ha

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

fill in the blanks

a large scale watershed has an area above ____ ha

A

a large scale watershed has an area above 50,000 ha

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

true or false

a small watershed has an areas of 10,000 ha and below

A

true

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

true or false

watershed is a natural landscape

A

true

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

true or false

a watershed has natural boundaries and dictated by law

A

false

a watershed has natural boundaries and not dictated by law

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

main function of a watershed

A

capture rainwater ideally for storage underground

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

fill in the blank

unstored rainwater are drained by streams through one outlet draining to a ____ (larger/smaller) watershed or to a lake, wetland, or sea

A

unstored rainwater are drained by streams through one outlet draining to a larger watershed or to a lake, wetland, or sea

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

true or false

one whole watershed is one that drains to a larger watershed

A

false

one whole watershed is one that drains to directly to the sea

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what are the different barriers that separates adjacent watersheds?

A
  • ridge
  • hill
  • mountains
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

identification

topographic boundary or barriers such as a ridge, hill or mountain that separates adjacent watershed

A

divide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

true or false

rainwater falling in one watershed can cross over two adjacent watersheds

A

false

theoretically, it cannot cross over to adjacent watersheds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

identification

geologic divide that partitions water penetrating the ground surface

A

phreatic divide

also known as subsurface boundary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

identification

estimating the water balance requires the knowledge of the?

A

phreatic divide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

all streams from all subwatersheds flow into the____ that carries all water to the outlet

A

mainstream

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

types of streams

A
  1. ephemeral (when it rains)
  2. intermittent (rainy season)
  3. perennial (all year)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

type of streams

have water only when it is raining

A

ephemeral streams

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

type of streams - true or false

intermittent streams have water all year round

A

false

intermittent streams does not have water all year round

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

type of streams

streams that have water only during rainy or wet season

A

intermittent streams

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

a subwatershed has a single unbranched stream called the?

A

a subwatershed has a single unbranched stream called the first order stream

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

a watershed is made up of many smaller watersheds called?

A

a watershed is made up of many smaller watersheds called subwatersheds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

true or false

a subwatershed drains it water to the larger watershed

A

true

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

the smallest subwatershed is one that has only ____ _______ ____

A

the smallest subwatershed is one that has only one unbranched stream

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

true or false

unbranched stream called first order streams has other streams feeding it

A

false

unbranched streams has no other streams feeding it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

true or false

a catchment is a watershed that has less than 5,000 ha

A

false

a catchment has less than 1,000 ha

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

true or false

micro catchments having similarities in area, topo, and land cover will behave differently

A

false

they will behave similarly

29
Q

the ____ (smaller/larger) the watershed, the more sensitive it is to changes in climate, land cover and use, and other human acts

A

the smaller the watershed, the more sensitive it is to changes in climate, land cover and use, and other human activities

30
Q

watersheds with area of less than 100,000 ha are called?

A

river basins

31
Q

these types of watersheds are sources of water for irrigation, hydroelectric power generation

A

river basins

32
Q

it is the largest watershed in the PH with almost 3m ha in area

A

cagayan river basin

33
Q

cagayan river basin is covered in large proportions by how many provinces?

A

cagayan river basin is covered in large proportions by 8 provinces

34
Q

the cagayan river basin is bounded by 3 largest mountain ranges in the country

____ in the east
caraballo in the south
____ in the west

A

the cagayan river basin is bounded by 3 largest mountain ranges in the country

sierra madre in the east
caraballo in the south
cordillera in the west

35
Q

a river basin where most of its subwatersheds drain to lake Lanao which then drains to iligan bay

A

agus river basin

36
Q

the agus river basin is mostly inside?

A

the agus river basin is mostly inside ARRMM

37
Q

this river basin supplies water to cagayan de oro

A

tagoloan river basin supplies water to cagayan de oro

38
Q

this river basin drains to cagayan de oro bay

A

tagoloan river basin drains to cagayan de oro bay

39
Q

this river basin straddles 3 bicol provinces

A

the bicol river basin straddles 3 bicol provincesbicol river basin

40
Q

the bicol river basin has less than __% forest cover

A

10% forest cover

41
Q

the bicol river basin perennially suffer from?

A

severe flooding

42
Q

true or false

the tagoloan river basin drains to san miguel bay

A

false

it is not the tagoloan river basin, but the bicol river basin rather

43
Q

more than __% of total land area of PH are watersheds

A

more than 90% of total land area of PH are watersheds

44
Q

true or false

a town or city can only fall into a one watershed

A

false

a town or city can be subdivided into various watersheds

45
Q

a town in quezon that is subdivided into various watersheds

A

general nakar

46
Q

most provinces are subdivided in watersheds of various sizes

A

true

47
Q

true or false

the quezon province is the first province that adopted watershed as unit for LCCAP and DRRMP preparation

A

false

it’s the aurora province that adopted watershed unit for LCCAP and DRRMP

48
Q

the province of ____ is the first province that adopted watersheds as unit for preparing CLUPS and Provinsial Physical Framework Plan

A

lanao del norte

49
Q

true or false

big watersheds are usually found inland

A

true

50
Q

small watersheds are usually found where?

A

usually along or near the coastline

51
Q

true or false

many watersheds are shared by several LGUs, their same priorities for development enables ease in watershed management

A

false

LGUs do not have same priorities for development

52
Q

what are the primary tasks of a watershed manager?

A
  • maximize amount of rainwater stored underground
  • maintain desired quality and quantity of streamflow
53
Q

two types of water resources in a watershed

A
  1. surface water
  2. groundwater
54
Q

two types of water resources in a watershed

refers to water stored below ground surface

A

groundwater

55
Q

two types of water resources in a watershed - true or false

surface water refers to all water accumulating on the ground surface

A

true

56
Q

global water is composed of

__%: seawater
__%: freshwater

A

global water is composed of

97%: seawater
3%: freshwater

57
Q

only 13% of freshwater is accessible, which amounts to only about ____% of the total global water resources

A

only 13% of freshwater is accessible, which amounts to only about 0.4% of the total global water resources

58
Q

true or false

a watershed consists of interconnected ecosystems that provide many ecosystem services, a change in one ecosystem will trigger changes in other ecosystems

A

true

59
Q

manager makes sure that changes in watershed do not have serious impacts on?

A

manager makes sure that changes in watershed do not have serious impacts on:
- soil
- water
- biodiversity

60
Q

interconnected ecosystems usually in a watershed

A
  • primary forest
  • secondary forest
  • agroforestry
  • grassland
  • agriculture
  • lakes
  • rural
  • urban
  • mangrove and coastal
  • marine
61
Q

interconnectivities of ecosystems from forest to the communities downstream

A
  • energy flow and nutri cycles
  • transport of sediments/soil materials
  • transport of products and raw materials
  • flow and cycle of water
  • transport of pollutants
  • dispersal of genetic materials, pests and diseases
  • mobility of people
62
Q

importance of watershed (what are the ecosystem goods and services it provides?)

A
  1. goods (provisioning services)
  2. regulating services
  3. cultural services
  4. supporting services

GpRCS - importance

63
Q

importance of watershed

examples of goods (provisioning services)

A
  • food, fibers and fuel
  • freshwaters
  • genetic resources
  • biochemicals
64
Q

importance of watershed

examples of regulating services

A
  • invasion resistance
  • herbivory
  • pollination
  • seed dispersal
  • pest and disease regulation
  • climate regulation
  • natural hazard protection
  • water purification

PSPHI - climhazpuri

65
Q

importance of watershed

examples of cultural services

A
  • spiritual and religious values
  • knowledge system
  • education and inspiration
  • recreation and aesthetic values
66
Q

importance of watershed

examples are supporting services

A
  • primary production
  • provision of habitat
  • nutrient cycling
  • soil formation and retention
  • production and retention
  • production of atmospheric oxygen
  • water cycling
67
Q

challenges that makes watershed management a difficult task

A
  • demands for
    • water
    • other watershed resources/goods
  • competition for land use
  • differences in development priorities/plans
68
Q

ecosystems in a watershed are interconnected by natural and human-induced processes

if human activities are not regulated, the ____ are altered and ____ intensify causing disruptions of the normal ecosystem functions

A

ecosystems in a watershed are interconnected by natural and human-induced processes

if human activities are not regulated, the human activitiesare altered and human-induced activities intensify causing disruptions of the normal ecosystem functions

NRC 170 First Exam (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions